JPH08234086A - Image magnification controller for camera - Google Patents

Abstract

PURPOSE: To stably control image magnification by inhibiting the image magnification control from being executed by an image magnification control means in the case of discriminating by a contrast discriminating means that the contrast is low. CONSTITUTION: The extended quantity to of the focusing lens group of a photographic lens 3 from an infinity end is calculated, the present focal distance information (f0 ) of a zooming lens group is inputted, and the image magnification m0 =x0 /f0 is obtained, then, the defocusing quantity (dx ) is calculated. Then, whether the contrast of the object is low, or not is judged, and in the case the contrast of the object is too low, the image magnification control is not finished and the image magnification control is made in an inhibition state. Then, in such the state, the zooming lens group is not moved under the image magnification control, thus, it does not become the main factor of the wear of a zooming lens group driving mechanism and power dissipation of a battery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention controls driving of a photographing lens of another camera such as a single-lens reflex camera, a video still camera or the like by a zoom driving means, and automatically sets an image magnification by the photographing lens to a set magnification. The present invention relates to an image magnification control device for a camera to be controlled.

[0002]

2. Description of the Related Art In a camera equipped with an image magnification control device of this type, a zoom lens, such as a zoom lens, is used, and a variable magnification function is used to control the image magnification of a subject. Is performed, and shooting is performed at a desired image magnification.

[0003]

By the way, in order to perform the image magnification control, it is necessary to correctly grasp the subject distance, and if the focus detection operation is not performed correctly, it is possible to appropriately drive the magnification change of the taking lens. This is not possible and the image magnification control becomes unstable.

The present invention has been made under such circumstances, and an object of the present invention is to provide a camera having an image magnification control device, which is capable of stable image magnification control.

[0005]

In order to solve such a problem, the invention according to claim 1 is to control a photographic lens capable of zooming and to control the photographic lens so that an image magnification of a subject becomes constant. The image magnification control means for calculating the focal length to change the focal length, the contrast discrimination means for discriminating the contrast state of the subject, and the image magnification control means when the contrast discrimination means discriminates that the contrast is low. And a prohibition unit for prohibiting the image magnification control by the image magnification control apparatus of the camera.

According to a second aspect of the present invention, in the image magnification control device of the camera according to the first aspect, the image magnification control means includes focus detection means for detecting a focus state of the photographing lens, and the photographing. Focal length detecting means for detecting the focal length of the lens, computing means for computing the control focal length based on the detection results of the focus detecting means and the focal length detecting means, and the focal length of the taking lens for the control focal length. Driving means for driving the photographing lens so as to match the above, and the prohibiting means repeatedly causes only the focus state detecting operation by the focal length detecting means until the determination of low contrast is released. The image magnification control device for the camera.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic explanatory view of a camera provided with a function of keeping the image magnification constant regardless of the movement of the subject.
In FIG. 1, 1 is a camera body, 2 is a lens mount of the camera body 1, 3 is a taking lens detachably attached to the lens mount 2, and the taking lens 3 is an autofocus mechanism (AF Mechanism) and a power zoom mechanism (PZ mechanism) which is a zoom driving means.
Note that AF is an abbreviation for auto focus, and PZ is an abbreviation for power zoom.

The camera body 1 is provided with a camera control circuit 4 as shown in FIG. 2, and the taking lens 3 is provided with a lens control circuit 5 shown in FIG.

[Camera Control Circuit 4] This camera control circuit 4
Has a main CPU 6 and a display CPU 7. This main CP
The serial output terminal SO of the display CPU7 is connected to the serial input terminal SI of U6, and the serial output terminal SI of the display CPU7 is connected to the serial output terminal SO of the main CPU6.
The clock terminal SCK of CPU6 is connected to the clock terminal S of CPU7 for display.
CK is connected.

The terminal PF of the main CPU 6 has a film
DX circuit 8 for ISO sensitivity detection (DX code detection) is connected,
To the terminal P20 of the main CPU6, the switch SWAF A / M for changing the auto / manual side of the camera is connected, and the main CPU6
The switch SWAF for focusing / release priority switching is applied to the terminal P21 of
S / C is connected.

This DX circuit 8, switch SWAF A / M, switch S
Wiring 9 is connected to the WAF S / C. Between this wiring 9 and the terminals P2 to P9 of the display CPU 7, the photometric switch SWS, the release switch SWR, and the power ON / OFF lock switch SWLOC.
K, mode switch SWMODE, drive switch SWDRIVE, exposure compensation switch SWXV, up switch SWUP, and down switch SWDOWN are respectively interposed. These constitute an operation switch group sw-I. By operating the mode switch SWMODE in combination with the switches SWUP and SWDOWN, program shooting, automatic shooting, manual shooting, etc. can be selected. Moreover, by operating the switches SWUP and SWDOWN in combination with the drive switch SWDRIVE, continuous shooting (continuous shooting), single shooting (single shooting), self-timer, etc. can be switched.
The exposure value can be corrected by operating the switches SWUP and SWDOWN in combination with the exposure correction switch SWXV. The photometric switch SWS and the release switch SWR are two-step push operation buttons which are operated in this order.

The main CPU 6 has terminals PA, PB, PC, PD, PE, VDD, Gnd
The output of the light receiving element 10 for subject brightness photometry that enters through the taking lens 3 is input to the terminal PA via the A / D conversion circuit 11, and the exposure correction signal is output from the terminal PB. It is input to the exposure control circuit 12. Further, an AF CCD, that is, a focusing CCD 14 is connected to the terminal PC via a CCD processing circuit 13 as a defocus amount detecting means. This CCD14
Is used for focus detection and the like by receiving the light flux from the subject by the photographing lens 3. AF motor control circuit 15 from terminal PD
The motor control signal is input to the AF motor control circuit 15
Drives and controls the AF motor 16 in the camera body 1.

The AF motor 16 rotationally drives a coupler 18 via a reduction gear 17. If a lens-side coupler that interlocks with the focusing lens group is provided at the end of the lens barrel, this shooting lens
When 3 is attached to the lens mount 2, the coupler 18 engages with this lens side coupler, and the AF motor 16 and the shooting lens
The focusing lens group can be focus-driven by the AF motor 16 in conjunction with the focusing lens group 3 of FIG. Since the lens of this embodiment has no lens-side coupler that engages with the coupler 18, the focusing lens group is not driven by the AF motor 16. A pulsar 19 is linked to the reduction gear 17, and the output of this pulsar 19 is the main CPU 6
Input to the terminal PE of.

A display LCD 20 is connected to the terminal P _SEG of the display CPU 7. To terminals P10 to P17 of this display CPU7,
Connection terminals Fmax1 to Fmax3, Fmin1, Fmin2 for information transmission, connection terminals A / MT for auto / manual information, common connection terminal C
The ont and power supply connection terminals Vdd-T are connected. ON / O to switch circuit 21 from terminal P18 of display CPU7
The FF signal is input, and the switch circuit 21 is connected to the power supply connection terminal VBATT.

On the positive side of the battery 22, the Vdd1 of the display CPU 7 and the grounded capacitor 24 are connected via the regulator 23, and the power supply terminal VDD of the main CPU 6 is connected.
Is connected via the DC / DC converter 6 ',
The switch circuit 21 is connected. And the display CPU7
A signal for ON / OFF control is input from the terminal P1 to the DC / DC converter 6 ′.

On the other hand, on the negative side of the battery 22, the ground terminal Gnd of the main CPU 6, the ground terminal Gnd of the display CPU 7,
Wiring 9 for operation switch group SW-I and connection terminal G for ground
nd-T is connected.

The above-mentioned connection terminals Fmax1 to Fmax3, Fmin1, Fmin
2, Cont, Vdd-T, VBatt, and Gnd-T are arranged on the end surface of the lens mount 2 to form a connection terminal group TI of the camera body.

In such a configuration, when the main switch, that is, the lock switch SWLOCK is in the OFF state, the display CPU
Since the operation signal is not input from the terminal P1 of 7 to the DC / DC converter 6 ′, the main CPU 6 is not supplied with power from the battery 22, and the main CPU 6 is in the OFF state.

On the other hand, a battery is connected to the terminal VDD1 of the display CPU7.
Since the voltage of 22 is applied via the regulator 23, the display CPU 7 operates even when the lock switch SWLOCK is in the OFF state. In this state, the display on the display LCD 20 is off.

When the lock switch SWLOCK is turned on, this
The ON signal is input to the terminal P4 of the display CPU7 and the display CPU7
A display signal is input from the terminal P _SEG of the display CPU 20 to the display CPU 20, and the display LCD 20 lights up. At the same time, for display
An operation signal is input from the terminal P1 of the CPU to the DC / DC converter 6 ′, and the voltage of the battery 22 is applied to the terminal VDD of the main CPU 6 via the DC / DC converter 6 ′. This causes the main CPU 6 to operate.

[Power Zoom / Focus Structure of Photographic Lens 3] The photographic lens 3 has a power zoom mechanism for driving the zoom lens groups 25 and 26 shown in FIG. 4 and a focusing lens (not shown). It has a focus drive mechanism for driving.

The power zoom mechanism includes a cylindrical fixed frame 27,
A lens frame that is fitted in the fixed frame 27 so that it can move back and forth in the axial direction.
28, a first cam barrel 29 that is rotatably fitted to the outer periphery of the fixed frame 27, and a second cam that is fitted to the outer periphery of the first cam barrel 29 so as to be rotatable and axially movable. Tube 30 and cam tube 30
It has a lens frame 31 fixed to. And the lens frame 2
Lens groups 25 and 26 are attached to 7,31.

A guide hole parallel to the axis is provided in the fixed frame 27 described above.
32, the cam cylinder 29 is provided with slit cams 33 and 34, and the cam cylinder 30 is provided with a slit cam 35 and a guide hole 36 parallel to the axis. Moreover, the guide roller 37 mounted on the outer periphery of the lens frame 28 is insert-engaged with the guide hole 32 and the slit cam 33, and the guide roller 37 mounted on the outer periphery of the fixed frame 27 is insert-engaged with the slit cam 34 and the guide hole 36. The guide roller 39 mounted on the outer periphery of the cam barrel 29 is inserted and engaged with the slit cam 35.

The above focus drive mechanism has an AF motor M1 for driving a focusing lens group (not shown), and the power zoom mechanism has a PZ motor M2 for driving the cam barrel 29. A variable aperture (not shown) provided in the optical path of the taking lens 3 is controlled by the AE motor M3. still,
The motor M1 and the focusing lens group and the motor M2 and the zooming lens group are interlocked via a friction clutch.

A zoom position reading means is interposed between the base of the cam barrel 29 and a code plate mounting member (not shown) on the fixed frame 27 side as one of focal length detecting means. The zoom position reading means includes a zoom code plate 40 held by a code plate support member and arranged concentrically around the cam barrel 29, and an inner peripheral surface bullet of the zoom code plate 40 attached to the base of the cam barrel 29. It has a brush 41 in contact (see FIG. 5). Moreover, a plurality of pattern contact points are intermittently provided in the circumferential direction on the inner peripheral surface of the zoom code plate 40, and the pattern contact point and the brush 41 work together so that the zoom position from the zoom code plate 40 is increased. The signal is output.

Similarly, a focus position reading means, that is, a distance reading means (not shown) is also provided on the focusing lens side as one of the focus position detecting means. This distance reading means also has the same structure as the zoom position reading means, and a distance signal is obtained from a distance code plate 42 (see FIGS. 1 and 3) similar to the zoom code plate 40.

[Lens control circuit 5] Connection terminals Fmax1 'to Fmax are provided on the end surface of the connection portion of the taking lens 3 to the lens mount 2.
3 ', Fmin1', Fmin2 ', Cont', Vdd-T ', VBATT', Gnd-T '
Is arranged. This connection terminal Fmax1 '~ Fmax3', Fmi
n1 ', Fmin2', Cont ', Vdd-T', VBatt ', Gnd-T', when the shooting lens 3 is mounted on the lens mount 2 of the camera body 1, the connection terminals Fmax1 ~ Fmax3, Fmin1, Fmin2, Cont, Vdd-
They are connected to T, VBatt, and Gnd-T, respectively, to form a connection terminal group T-II. The connecting terminal groups T-II and TI form a connecting portion TC. Data is transmitted between the camera control circuit 4 and the lens control circuit via the connection section TC.

A lens ROM 43 for storing information peculiar to the lens and a lens CPU 44 used for controlling the lens are built in the photographing lens 3. The information unique to this lens includes, for example, the maximum number of pulses of the focusing lens group and the zooming lens group, whether or not power zoom is possible, whether or not power focus is possible, whether or not a varifocal lens is used, focus correction value due to zoom, etc. There is information on. Terminal PL of this lens ROM43 and lens CPU44
The output signal of the zoom code plate 40 is input to the terminal Pk of
The distance signal from the distance code plate 42 is input to the terminal PM of the lens ROM 40.

Motor control signals output from the terminals PH, PI, PJ of the lens CPU 44 are AF motor drive section (AF motor control circuit) 45, PZ motor drive section (PZ motor control circuit) 46, AE motor drive section ( AE motor control circuit) 47, respectively. The motor drive units 45, 46, 47 drive and control the motors M1, M2, M3, respectively. Also, the rotation of the motors M1, M2, M3
The AF pulsar 48 (one of focus position detecting means), the PZ pulsar 49 (zoom position detecting means or one of the focal length detecting means), and the AE pulsar 50 detect the pulsar 4
The output signals of 8, 49 and 50 are input to the terminals P20 to P22 of the lens CPU 44, respectively.

The connection terminal VBATT 'is connected to the power input section of the motor drive sections 45 to 47, and the connection terminal Vdd-T' is the lens CPU 44.
Of the resistor 51 and the cathode side of the diode 52, and the other end of the resistor 51 and the anode side of the diode 52 are connected to the reset terminal RESET of the lens CPU 44 and the ground wire. It is connected to 53 via a capacitor 54. The connection terminal Gnd-T ′, the ground terminal Gnd of the lens ROM 43, and the ground terminal Gnd of the lens CPU 44 are connected to the ground wire 53. In addition, this ground wire 53 has a switch SWAF (A / M) for automatic manual switching and a switch SWPZ (A for power zoom mode).
/ M), image magnification constant mode switch SWPZC that keeps the image magnification of the zooming lens constant, the zoom lens at the Tele end
Zoom switch SWPZT that drives to the (telephoto end) side, Zoom switch SW that drives the zooming lens to the Wide end (wide-angle end) side
PZW is connected. These switches SWAF (A / M), SWPZ
(A / M), SWPZC, SWPZT, SWPZW are lens CPU44 terminals P23 to P27
Respectively connected to.

The connection terminal Fmax1 'is a reset terminal RESET of the lens ROM 43 and an INT terminal (interruption terminal) In of the lens CPU 44.
t and the emitter of transistor 55, connecting terminal F
max2 'is connected to the clock terminal SCK of the lens ROM43, the clock terminal SCK of the lens CPU44 and the emitter of the transistor 56, and the connection terminal Fmax3' is the serial output terminal SO of the lens ROM43, the serial input / output terminal SI / SO of the lens CPU44 and the transistor. Connected to 57 emitters. Further, the connection terminal Fmin1 ′ is the terminal RDY of the lens CPU44 and the transistor 58.
, The connection terminal Fmin2 'is connected to the ground wire 53 via the information setting fuse 59, and the connection terminal
A / MT 'is connected to the ground wire 53 via a switch SW A / M used for switching between auto or program operated by a diaphragm ring and A / M, and the connection terminal Cont' and the bases of the transistors 55 to 58 are the lens ROM43. Power input terminal VCC
It is connected to the. Moreover, the collectors of the transistors 55 to 58 are connected to the ground line 53.

[Principle of Constant Image Magnification] In FIG. 6, F ₁ is the focal position on the front side (object side or subject side) of the taking lens 3, F ₂ is the focal position on the rear side (image side) of the taking lens 3, y ₁ is the size of the object (subject) in front of the taking lens 3, y ₂ is the size of the image formed behind the taking lens 3 by the light flux from infinity, and a is from the front focus position F ₁ to the object. The distance, x is the distance from the rear focal position F ₂ to the image, and f is the focal length of the taking lens 3. Then, the position where the image of y ₂ is formed becomes the focus position.

The image formation formula in FIG. 6 is expressed as follows: a · x = f ² …………………………………… A Is.

Here, the image magnification is based on the distance a on the object side.
The image magnification m is calculated from the equations A and B, Becomes

Further, the image magnification is A, B with reference to the distance x on the image side.
From the formula, the image magnification m is Becomes

If the image magnification is m ₀ when x and f in the equation (2) are x ₀ and f ₀ as shown in FIG. 7A, the image magnification m ₀ is Becomes Here, as the object y ₁ moves, the object shown in FIG.
When the defocus dx occurs as shown in (b),
Assuming that the distance from the front focus position F ₁ to the object (subject) y ₁ is a ₁ , the formula A is a ₁ (x ₀ + dx) = f ₀ ² ……………………………… (4 ), And the distance a ₁ is Becomes Here, assuming that a new focal length for constant image magnification (m ₀ ; constant) is f, equation (1) is Becomes By transforming this equation (6) with respect to f and substituting equations (3) and (5) into this transformed equation, Becomes When the zoom ratio is calculated from this equation (7), the zoom ratio f
/ f ₀ is Becomes

Therefore, if the zoom ring is driven so as to change by this zoom ratio, the image magnification becomes constant (m ₀ = f / a ₁ = x ₀ / f ₀ ) as shown in FIG. 7C. Become.

By the way, the focal length f of the taking lens 3 changes three-dimensionally like the focal curved surface 60 shown in FIG. 8 depending on its zoom position and focus position. As a result, the above-mentioned distance x ₀ to the image plane also changes three-dimensionally like the curved surface 61 shown in FIG. 9 depending on the zoom position and the focus position.

Further, depending on the zoom position of the taking lens 3, K
Value Kval (lens extension amount and focus shift ratio) changes. Then, the zoom position and Kval by the zoom code plate 40
The relationship between and changes stepwise as shown by the correction coefficient line 62 shown by the solid line in FIG. 10, and the relationship between the zoom position and the focal length at this time also changes stepwise as shown by the correction coefficient line 63 in FIG. Changes to. In the case of FIGS. 10 and 11, the correction coefficient lines 62 and 63 are broken lines 62.
It is desirable for zoom control and focus control that smooth changes can be obtained as indicated by ', 63'. Therefore, information for correction shown in Table 1 is stored in the lens ROM 43 in advance, and f and x ₀ are calculated by the lens CPU 44.

Table 1. [Information for correction] 01 Start pulse number in encoder on zoom code plate P _h 02 Start pulse width in encoder on zoom code plate Pw 03 Start Kval K _h 04 Start Kval Correction coefficient Kc 05 Start focal length f _h 06 Top focal length correction coefficient fc 07 Focus lens position, focal length primary correction coefficient f _fc1 08 Focus lens position, focal length secondary correction coefficient f _fc2 09 Extension amount x ₀ Calculation coefficient Q, R, S, T 10 Image magnification ratio → zoom drive pulse conversion coefficient A, B, C Here, the leading Kval, that is, the leading K value is the step K _i (I = 0,1,2,3, ...) Of the correction coefficient line 62 in FIG. ... Kval at either the left or right end of N). That, L (Tel) when directed to the S (wide) side from the side of the right end of the stepped portion K _i, also the Kval the left end of the stepped portion K _i when flowing in opposite therewith.

The correction coefficient Kc of the head Kval is a coefficient for approximating the value corresponding to the curve 62 'as the slope of the straight line in the step K _i . Also, the top focal length f _h is
Similar to Kval, it means one of the left and right ends of the correction coefficient line f _i (I = 0,1,2,3, ... N), and the head focus correction coefficient fc is also a value corresponding to the correction curve 63 ′. Is a coefficient for calculating approximately as a slope of a straight line in the step portion f _i . The Kval and the focal length obtained in this way are the correction curves 62 in FIGS.
It becomes like "63". The focusing lens position focal length primary correction coefficient f _fc1 is obtained from the curve 64 determined by the zoom position and the focal length shown in FIG. Further, the focusing lens position and the focal length quadratic correction coefficient f _fc2 are the three-dimensional focus curved surface 60 considering the focus amount in the above f _fc1.
Is determined.

The focal curved surface 60 is a curved surface that is determined by the optical design and mechanical design of the taking lens 3, and cannot always be expressed exactly and proportionally by a simple formula. Although the amount of extension of the focusing lens defined by this curved surface is almost proportional to the zoom amount of the zooming lens, it is not completely proportional in this case as well. Therefore, it is necessary to correct the amount of extension of the focusing lens.
The correction coefficient for this is Q, R, S, T, and this correction coefficient Q,
R, S, T vary depending on the optical design and mechanical design of the lens, and the equation (10) using the correction coefficients Q, R, S, T also varies depending on the optical design and mechanical design of the taking lens. Also,
The zooming lens drive pulse number Pz used to control the image magnification constant is also determined by the optical design and mechanical design of the taking lens. Therefore, the correction factors A, B, and C in the equation (11) for calculating this Pz are values determined by optical design and mechanical design.

Here, if the absolute position pulse number of the current zoom ring of the taking lens 3 is Ps and the absolute position pulse number of the current focusing lens is Pinf, the focal length f and the amount of extension x
₀ is f = f _h + fc × (Ps-P _h ) + f _fc1 × Pinf + f _fc2 × (Pinf) ² ………………… (9) x ₀ = Q (Pinf) ³ + R ( Pinf) ² + S (Pinf) + Pinf × T (P _h -Ps) ………………… (10). In this case, Pinf should be kept small in consideration of the overshoot of the feed amount toward the infinite side. Also,
When the control image magnification is γ, the zoom drive pulse number Pz can be calculated as Pz = Aγ ³ + Bγ ² + Cγ (11).

The data shown in Table 1 and the above-mentioned calculation formulas are stored in the lens ROM 43 of the taking lens 3 in advance.

The main terms used in the flowchart for explaining the control operation of the camera control device having such a configuration will be described.

In this flowchart, AFSTOP indicates a process of stopping the focusing lens group.

Further, FL is a Far Limit.
Is an abbreviation for and indicates a flag for detecting the far end of the focusing lens group. When FL = 1, it means that the control circuit detects that the focusing lens group is at the Far end, and when FL = 0, it means that the Far end is not detected.

NL is an abbreviation for Near Limit and indicates a Near end detection flag of the focusing lens group. When NL = 1, the focusing lens group is Ne
It means that the control circuit detects that it is at the ar end, and when NL = 0, it means that the near end is not detected.

Pinf is the number of driving pulses from the Far end side to the Near end side of the focusing lens group. When Pinf = 0, it means that the focusing lens group is at the Far end. This pulse number is detected by the AF pulser 48.

WL is an abbreviation for Wide Limit and indicates a Wide (wide) edge detection flag of the zooming lens group. When the flag WL is WL = 1, it means that the control circuit detects that the zooming lens group is at the wide end (Wide end), and when WL = 0, the Wide end is not detected. Means that.

TL is an abbreviation for Tele Limit and is a Tele end detection flag of the zooming lens group. When the flag TL is TL = 1, it means that the control circuit detects that the zooming lens group is at the Tele end, and when TL = 0, it means that the tele end is not detected. means.

MFL is a macro far limit
Abbreviation of (Limit), the Far end detection flag of the focusing lens unit by zoom driving in the macro region, that is, the Far end detection flag by the zooming lens unit driving in the macro region is shown. When this flag MFL is MFL = 1,
This means that the control circuit has determined from the signal output from the zoom code plate 40 that the zooming lens group is in the tele macro state and is at the Far end during focusing. Further, when MFL = 0, it means that the Far end is not detected.

MNL is a macro near limit (Macro Near L
Abbreviation of "imit)" indicates a Near end detection flag of the focusing lens unit by zoom driving in the macro region, that is, a Near end detection flag by driving of the zooming lens unit in the macro region. When this flag MNL is MNL = 1, it is determined from the signal output from the zoom code plate 40 that the zooming lens group is determined to be a telemacro, and that the control circuit detects that it is at the Near end during focusing. means.
Further, when MNL = 0, it means that the Near end is not detected.

SWREN is a release permission flag, and flag SWR
When EN is SWREN = 1, release is enabled and flag SWREN is
When SWREN = 0, it indicates that release is not permitted.

MF is Manual Focus
Is an abbreviation for the flag for manual focus. When this flag MF is MF = 1, it indicates that manual focus is in progress, and when MF = 0, it indicates that manual focus is not in progress.

AF is an abbreviation for auto focus and indicates a flag during auto focus. When the flag AF is AF = 1, it indicates that autofocus is in progress, and when the flag AF = 0, it indicates that autofocus is not in progress.

PZMACRO is a flag indicating whether or not the zooming lens group is in the macro area by the power zoom mechanism. This flag PZMACRO is PZMAC
When RO = 1, it means that the zooming lens group is in the macro area. When PZMACRO = 0, it means that the focusing lens group is not in the macro area.

AFGO indicates a focusing lens group drive flag. When the flag AFGO is AFGO = 1, it means that the AF motor M1 is operating to drive the focusing lens group, and AFGO = 0. When, it means that the focusing lens group is not driven by the AF motor M1.

PZGO represents a zooming lens group drive flag. When the flag PZGO is PZGO = 1, it means that the PZ motor M2 is operating and the zooming lens group is driven.
When = 0, it means that the zooming lens group is not driven by the PZ motor M2.

PZMGO indicates a flag indicating whether the zooming lens group is driven by the PZ motor M2 in the macro area. When the flag PZMGO is PZMGO = 1, it means that the zooming lens group is driving, and PZMGO = When 0, it means that it is not driving.

PZMODE is a flag indicating whether or not the zooming lens group can be driven by the power zoom mechanism.
When MODE = 1, driving is possible, and when PZMODE = 0, driving is not possible.

MAGIMG is a flag for starting the constant image magnification control. When MAGIMG = 1, the constant image magnification control is started to
When MG = 0, constant image magnification control is not performed. ONIMG is a flag indicating whether constant image magnification control is being performed.
When G = 1, the image magnification constant control is being performed, and when ONIMG = 0, the image magnification constant control is not being performed.

AFFARGO Far Focusing Lens Group Far
Processing for driving in the (far) direction is shown, and AFNEARGO is processing for driving the focusing lens group in the near (near) direction. AFDRVF is a flag that indicates which direction the focusing lens group is driven in this process.
When = 1, the driving direction is the Far direction, and when AFDRVF = 0, the driving direction is the Far direction instead of the Far direction.

PZTELGO indicates a process for driving the zooming lens group in the Tele direction, and PZWIDEGO indicates a process for driving the zooming lens group in the Wide direction. PZDRVF is a flag that indicates which direction the zooming lens group is driven in this process.When PZDRVF = 1, the driving direction is Tele, and when PZDRVF = 0, the driving direction is not Tele.
It means the Wide direction.

MCRFARGO represents the driving processing of the zooming lens group for the focusing lens group in the macro area, and MCRNEARGO represents the driving processing of the zooming lens group for the focusing lens group in the macro area. MCRDRVF is a flag that indicates which direction the zooming lens group is driven in this process, and MCRDRVF =
When 1 means that the driving direction is the Far direction, and when MCRDRVF = 0, it means that the driving direction is not the Far direction but the Near direction.

AFS is a focus priority mode flag, and AFS = 1
When, the focus priority is given, and when AFS = 0, the focus priority is not given but the release priority is given.

AF CORR is an abbreviation for AF CORRECT, and there is a photographic lens (for example, a varifocal lens) that is out of focus when a zoom operation of the zooming lens group is performed while focusing is prioritized. This is a flag for making the correction. When AFCORR = 1, it means that the focus shift is corrected, and when AFCORR = 0, this correction is not performed.

ON / OFF of the macro switch means, in the information from the zoom code plate 40, whether or not the zooming lens group is in the macro area.

Next, the control operation of the camera control device having such a configuration will be described with reference to a flowchart.

When the lock switch SWLOCK is turned on, the operation of the control device including the camera control circuit 4 and the lens control circuit 5 starts as shown in FIG. 14, and is initialized in S1.

In this initialization, as shown in FIG. 40, first, in S1-1, an AF mode switch (AF mode switch), that is, a switch SWAF A / M, SWA for automatic / manual switching.
If F (A / M) is ON, it is judged and if it is ON
If YES (AF), move to S1-2. If not ON, move to S1-26 with NO (manual). In S1-2, the focusing lens, that is, the focusing lens group is driven to the Far end (fur end).

This drive processing is performed by the subroutine shown in FIG. In this S-AFG1 in Fig. 41, the AF motor drive
By operating 45 and operating the AF motor M1,
The focusing lens group is driven to the Far end side. Then, set the Far direction drive flag AFDRVF = 1 in S-AFG2, and set S-AFG
Set the flag AFGO = 1 while driving the focusing lens group in 3 and set the Near Limit (near limit end) of the focusing lens group, that is, the near end detection flag NL in S-AFG4 to NL = 0 and set the Far Limit (far limit). (Limit), that is, the Far end detection flag FL is set to FL = 0, the process returns to FIG. 40 and proceeds to S1-3.

Further, while the focusing lens group is being driven to the Far end side, a drive pulse is output from the AF pulsar 48,
This drive pulse is input to the lens CPU 44. Whether this drive pulse is output from the AF pulser 48 is shown in Fig. 40.
Judged in S1-3. This judgment is made if the pulse interval is 100 msec or more and less, and if NO (less than 100 msec M) appears, YES (10
Loop and repeat the judgment until it becomes 0 msec or more).
When this pulse interval exceeds 100 msec, the focusing lens group is driven to the Far end and stopped, and the AF
The friction clutch that links the motor M1 and the focusing lens group is in a slipping state. Therefore, when the pulse interval becomes 100 msec or more, YES (1
After 00msec), move to S1-4 and AF STOP. This AFSTOP
Then, as shown in FIG. 47, the S-AS1 determines whether or not the focusing lens group is being driven (AFGO = 1), and if not, moves to NO in S1-5 of FIG. 40. To do. If the focusing lens group is driven according to the judgment of S-AS1, YES means SA
The process moves to S2, and in this S-AS2, the driving of the focusing lens group is stopped by stopping the operation of the AF motor M1, and the process moves to S-AS3. In this S-AS3, set the focusing lens group driving flag AFGO to AFGO = 0, which indicates non-driving,
The process moves to S1-5 in FIG. In S1-5, the Far end detection flag FL of the focusing lens group is set to FL = 1. At this time, the focusing lens group is not at the Near end, so S1
Then, the process shifts to -6, sets the Near end detection flag NL of the focusing lens group to NL = 0, and shifts to S1-7.

When NO (manual) is determined by determining whether or not the AF mode SW of S1-1, that is, the switch SWAFA / M for automatic / manual switching is ON, the position of the focusing lens group is determined. I don't know if it is in, so after shifting to S1-26 and setting Far end detection flag FL to FL = 0, it is Ne in S1-27.
The ar end detection flag NL is set to NL = 0, and the process proceeds to S1-7.

At the stage of S1-7, since the focusing lens group is at the Far end and the driving pulse number Pinf from the Far end of the focusing lens group is 0, Pinf = 0. After that, in S1-8, the zooming lens, that is, the zooming lens group
Wide edge detection flag WL is set to WL = 0, Tele edge detection flag TL of zooming lens group is set to TL = 0 in S1-9, Far edge detection of focusing lens group by zoom ring drive in macro area is set in S1-10. The flag MFL is set to MFL = 0, the near end detection flag MNL of the focusing lens group by zoom ring driving in the macro area is set to MNL = 0 in S1-11, and the release permission flag SWREN is set to SWREN = 0 in S1-12. The flag MF during manual focus is set to MF = 0 in S1-13, the flag AF in autofocus is set to AF = 0 in S1-14, and the process proceeds to S1-15.

In S1-15, it is determined whether or not the macro switch is turned on to be in the macro area, and if YES (ON), the process proceeds to S1-16 to set the macro area flag PZMACRO to PZMACRO = 1, and NO.
If it is (OFF), move to S1-17 and set macro area flag PZMA.
Set CRO to PZMACRO = 0 and move to S1-18.

In S1-18, the focusing lens group drive flag AFGO is set to AFGO = 0, in S1-19 the zooming lens group drive flag PZGO is set to PZGO = 0, and in S1-20, P in the macro area is set.
AF drive flag PZMGO by Z mechanism (power zoom mechanism)
Set MGO = 0 and set the flag PZMO during power zoom drive in S1-21.
DE is set to PZMODE = 0, the flag MAGIMG for starting the image magnification constant control is set to MAGIMG = 0 in S1-22, the image magnification constant control flag ONIMG is set to ONIMG = 0 in S1-23, and in S1-24, for example, Start the timer for 5msec, enable the timer interrupt in S1-25, and move to S2 in Fig.14.

In this S2, the AF mode SW, that is, the auto mode
It is determined whether or not the switch SWAF A / M for manual switching is ON, and if it is ON, YES (AF) will move to S3 and ON.
If not, move to M in Fig. 23 with NO (manual).

In S-M1 of FIG. 23, it is determined whether or not the AF mode switch (switch SWAF A / M) is turned on and the AF operation is in progress (AF = 1). If YES (AF operation is in progress), the process moves to K in FIG. 35, and if NO, S-M2 is in the manual focus flag MF.
Is set to MF = 1, the process proceeds to S-M3, and the defocus amount dx of the focusing lens group is calculated by this S-M3, and then it is determined by S-M4 whether or not the contrast is low. In this determination, if the contrast is low, YES is selected and the focus display is turned off by shifting to S-M7. If NO, the process is shifted to S-M5 and it is determined whether or not focus is achieved. If NO in this S-M5, shift to S-M7 to turn off the focus display, and if YES, shift to S-M6 to turn on the focus display and return to A of FIG. 14, AF mode switch (switch SW
AF (A / M) is judged to be ON (input), and if it is manual, the loop between M in FIG. 23 and A in FIG. 14 is repeated.

If YES in S-M1 of FIG. 23 (AF operation is in progress) and the flow shifts to K of FIG. 35, the timer interrupt is disabled in S-K1 and the AF-STOP processing of S-K2 is performed. In this AF STOP processing, as shown in FIG. 47, it is determined in S-AS1 whether or not the focusing lens group is being driven (AFGO = 1). If it is not driven, NO is selected and S- in FIG. Move to ZOOM STOP processing of K3. If YES, the operation of the AF motor M1 is stopped to stop the driving of the focusing lens group, and the S-AS3
Moving to focusing lens group driving flag AFGO = 1
AFGO = 0 and shifts to the ZOOM STOP processing of S-K3 in FIG.

In this ZOOM STOP processing, as shown in FIG. 48, it is determined in S-Z1 whether or not the zooming lens group is being driven (PZGO = 1). If NO, the process proceeds to S-Z2. It is judged whether "AF drive (auto focus drive) by the power zoom mechanism (PZ mechanism) in the macro area" is performed, and the PZ
If AF is not being driven by the mechanism (PZMGO = 1), set NO to SK in Fig. 35.
Move to 4. If the zoom lens group is being driven by the S-Z1 or if the AF drive is being performed by the S-Z2 (PZMGO = 1), then YES is selected and the operation of the PZ motor M2 is stopped. Drive of the zooming lens group is stopped and the S-Z4
Then set the zooming lens group driving flag PZGO to PZGO = 0,
In S-Z5, the flag PZMGO is set to PZMGO = 0, and the process proceeds to S-K4 in FIG.

In this S-K4, the focus display is turned off and the process proceeds to S-K5. With this S-K5, the AF mode switch (switch SW AF
It is judged whether or not (A / M) is input (ON), and if NO,
The process moves to S-K6, and if YES (AF), the process moves to AFFARGO processing of S-K7. Then, in the S-K6, the focusing lens group Fa
The r-end detection flag FL and the focusing lens group Near-end detection flag NL are set to FL = NL = 0, and the process proceeds to S-K12.

Further, in the S-K7 AFFARGO, the focusing lens group is set in the subroutine shown in FIG. 41 in the same manner as described above.
Drive in the Far direction and set each flag to AFDRVF = 1, AFGO = 1, NL = 0,
With FL = 0, the process proceeds to S-K8 in FIG.

Then, while the focusing lens group is being driven in the Far direction, a drive pulse is output from the AF pulsar 48, and this drive pulse is input to the lens CPU 44.
It is determined in S-K8 whether or not this drive pulse is output from the AF pulser 48. This judgment has a pulse interval of 100 mse
Yes if less than or equal to c and NO (less than 100 msec) YES
Loop and repeat the judgment until (100 msec or more). When this pulse interval becomes 100 msec or more, the focusing lens group is driven to the Far end and stopped, and the friction clutch that links the AF motor M1 and the focusing lens group slips. It will be awake. Therefore, when the pulse interval is 100 msec or more, YES (above) is entered and the process moves to S-K9 to perform AFSTO processing. this
In the AFSTOP processing, as shown in FIG. 47, it is determined whether or not the focusing lens group is being driven (AFGO = 1) on the S-AS1,
If it is not driven, the process proceeds to S-K10 in Fig. 35 with NO, and if YES, the drive of the focusing lens group is stopped by stopping the operation of the AF motor M1, and the process proceeds to S-AS3 to move to the foreground lens group. The flag AFGO during the driving of the focusing lens group is set to AFGO = 0, and the process proceeds to S-K10. In this S-K10, the Far end detection flag FL of the focusing lens group is set to FL = 1. At this time, the focusing lens group is not at the Near end, so S-
After shifting to K11, the Near end detection flag NL of the focusing lens group is set to NL = 0, and then shifts to S-K12.

At the stage of S-K12, since the focusing lens group is at the Far end, the number of drive pulses Pinf from the Far end of the focusing lens group is 0, so Pinf = 0. After that, in S-K13, the wide end detection flag WL of the zooming lens, that is, the Tele end detection flag TL of the zooming lens group is set to WL = TL = 0. Also, SK
In 14, the Far end detection flag MFL of the focusing lens group driven by the zoom ring in the macro area and the focusing lens group of the focusing lens group driven by the zoom ring in the macro area are set.
The Near end detection flag MNL is set to MFL = MNL = 0. In the S-K15, set the image magnification constant control flag ONIMG to ONIMG = 0, and in the S-K16, set the flag MAGIMG for starting the image magnification constant control to MAGI.
Set MG = 0, and with S-K17, flag M during manual focus
Set the flag AF during F and auto focus to MF = AF = 0 and S-
In K18, set autofocus correction flag AFCORR to AFCORR = 0
Then, in S-K19, the timer interrupt is permitted, and the process returns to S2 in FIG.

In the determination of S2, if the switch SWAF A / M for automatic / manual switching is ON, YES (AF) is selected and S3 is selected.
Move to Manual focus flag in this S3
It is determined whether MF is MF = 1, and if it is in focus, YES
Then, the process proceeds to K, and if NO, the process proceeds to S4.

At S4, it is judged whether or not the photometric switch SWS is turned on. If not, the photometric switch SWS is turned on.
The above operation is repeated by returning to S2 until is turned on. Also,
If it is ON, the process moves to S5 and AF flag during auto focus
Is set to AF = 1, the defocus amount dx of the focusing lens group is calculated in the next S6, and the process proceeds to S7. In this S7, it is determined whether or not the subject has low contrast based on the amount of light from the subject incident on the light receiving element 10. If the contrast is low, YES is determined.
Return to S2 and repeat the above operation until the contrast increases. If NO, that is, if the contrast is not low, the process proceeds to S8 in FIG. In S8, it is determined whether or not focus is achieved. If NO (non-focus), the process proceeds to S9, and if YES (focus), the process proceeds to S21. In this S21, whether the image magnification constant mode switch SWPZC is turned on (turned on) to start the constant image magnification control flag MAGIMG is set or not, that is, MAGIMG
= 1 is determined. Then, if the flag MAGIMG is set to YES, the focus display is turned off in S25 and the process shifts to B in FIG. 16,
If the flag MAGIMG is not set, the process proceeds to S22 with NO and the focus indicator lights up, and then the release permission flag SWREN is set to SWREN.
= 1 and shift to S24. In this S24, it is determined whether AFS = 1, that is, the switch SWAF S / C for focus / release priority switching.
Enters the S side (focus priority side) and determines whether or not the focus priority flag AFS = 1 is set. If YES, it loops to focus lock, and if NO, that is, AFC side (release priority side), returns to S2.

Further, it is determined NO (non-focus) by the determination of whether or not the focus is in S8.
In S9, the release permission flag SWRE
Set N to SWREN = 0 and move to S10. Then, in S10, the focus display is turned off and the process proceeds to S11. In this S11, the driving amount of the focusing lens group is calculated from the defocus amount dx obtained in S6.
Calculate dp and move to S12. In S12, it is determined whether or not the driving direction of the focusing lens group is the Near direction, and YES (Ne
If it is (ar direction), the process proceeds to S13, and if it is NO (Far direction), it is S18.
Move to

In this S13, the focusing lens group Nea
It is determined whether or not the r-edge detection flag NL is NL = 1, that is, whether or not the focusing lens group is at the Near Limit (Near edge).
Focusing lens group is at Near Limit NL
If it is = 1, the process moves to I in FIG. 22, and if the focusing lens group is not at the near end (Near Limit) and is NO, then S1
Move to 4. In S18, it is determined whether or not the focusing lens group Far end detection flag FL is FL = 1, that is, whether or not the focusing lens group is at the Far end. Focusing lens group is at Far Limit
If FL = 1, the process moves to I in FIG. 22, and if the focusing lens group is not at the Far end (Far Limit) and is NO, S1
Go to 9.

If the process shifts to I in FIG. 22, it is determined in S-I1 whether or not the power zoom drivable flag PZMODE is PZMODE = 1. If NO, the process returns to S2 in FIG. 14 to loop. If YES, the process proceeds to S-I2. In this S-I2, the macro switch is turned on and the macro area flag PZMACRO is set to PZMAC.
Determine whether RO = 1. If NO, the process returns to S2 in FIG. 14 to loop, and if YES, the process proceeds to S-I3. This S-I3
Then, the focusing drive amount zdpx by the zooming lens group is calculated from the defocus amount dx described above, and the process proceeds to S-I4. The S-I4 determines whether the focusing direction by the zooming lens group is the Far direction or the Near direction. If YES (Near direction), the process proceeds to S-I5, and if NO (Far direction), the S-I12
Move to Then, in S-I5, it is determined whether or not the Near end detection flag MNL of the focusing lens group by the zoom ring drive in the macro area is MNL = 1, and if YES, S2 in FIG.
It loops back to and if NO, shifts to MCRNEARGO processing of S-I6. Further, in S-I12, it is determined whether or not the Far end detection flag MFL of the focusing lens group by the zoom ring drive in the macro area is MFL = 1. If YES, the process returns to S2 of FIG. 14 to loop, and NO If so, the process moves to S-I13 MCRFARGO processing.

Then, the processing of S-I6 drives the zooming lens group in the Near direction as shown in FIG. 46, and the processing of S-I13 drives the zooming lens group in the Far direction as shown in FIG.

That is, in the processing shown in FIG. 46, S-MNG1
The PZ motor M2 is operated to drive the zooming lens group in the Near direction, and the S-MNG2 sets the Far direction drive flag MCRDRVF of the zooming lens group in the macro area to MCRDRV.
Set F = 0 (Near direction) and use S-MNG3 to move the zooming lens group for focusing in the macro area. PZMG
O is set to PZMGO = 1 (during driving), S-MNG4 sets the Tele end detection flag TL of the zooming lens group to TL = 0, and S-MNG5 sets the Wide end detection flag WL of the zooming lens group to WL = 0, Ne by driving the zooming lens group in the macro region with S-MNG6
Set the ar edge detection flag MNL to MNL = 0 and set the Far edge detection flag M by driving the zooming lens group in the macro area with S-MNG7.
Set FL to MFL = 0 and move to S-I7 in FIG.

In the processing of S-I13, as shown in FIG. 45, the PZ motor M2 is operated by S-MFG1 to drive the zooming lens group to the Far end side, and S-MFG2 is used for zooming in the macro area. Far direction drive flag MCRDR of lens group
VF is set to MCRDRVF = 1 (Far direction), S-MFG3 sets the zooming lens group driving flag PZMGO for focusing in the macro area to PZMGO = 1 (driving), and S-MFG4 Tele of the zooming lens group is set. The edge detection flag TL is set to TL = 0, the wide edge detection flag WL of the zooming lens group is set to WL = 0 in S-MNG5, and S-
In MFG6, set the Near edge detection flag MNL by the zooming lens group drive in the macro area to MNL = 0, and in S-MFG7, set the Far edge detection flag MFL by the zooming lens group drive in the macro area to MFL = 0. Move to I7. Incidentally, while the zooming lens group is being driven, a drive pulse is output from the PZ pulsar 49, and this drive pulse is input to the lens CPU 44.

At S-I7, it is determined by the focusing driving amount zdpx by the zooming lens group obtained at S-I3, that is, whether or not the zooming lens group is driven by zdpx. Then, if it is driven, the result is YES, the flow proceeds to S-I14, and ZOOMST in Fig. 48.
Perform OP processing and return to S2 in FIG. If NO, S-I8
Move to

In this S-I8, the drive pulse is the PZ pulser 49.
It is determined whether or not it is output from. This determination is made when the pulse interval is 100 msec or more or less, and if NO (less than), the determination is repeated by looping until YES (more than). When this pulse interval becomes 100 msec or more, the zooming lens group is driven to the Far end or the Near end and stopped, causing the friction clutch that links the PZ motor M2 and the zooming lens group to slip. It will be in the state of being. Therefore, when the pulse interval becomes 100 msec or more, YES (or more) is selected and the process proceeds to S-I9, the ZOOM STOP process of FIG. 48 is performed, and the process proceeds to S-I10. In this S-I10, it is judged whether or not the driving direction is the Far direction, and if NO (Near direction), S-I11
Then, the process returns to S2 in FIG. 14 with the Near edge detection flag MNL by the zooming lens group drive in the macro region set to MNL = 1, and if YES (Far direction), the process shifts to S-I15 to move the zooming lens in the macro region. The Far end detection flag MFL by group drive is set to MFL = 1 and the process returns to S2 in FIG.

Further, when shifting from S13 to S14 in FIG. 15, the focusing lens group is driven in the Near direction as shown in FIG. 42, and when shifting from S18 to S19, the focusing lens group is moved. As shown in FIG. 41, the group is driven in the Far direction.

In the processing of FIG. 41, the flag AFDRVF indicates that the focusing lens group is driven in the Far direction by the S-AFG1 and the driving direction of the focusing lens group is the Far direction by the S-AFG2.
Is set to AFDRVF = 1 (Far direction), the flag AFGO during driving of the focusing lens group is set to AFGO = 1 (driving) by the S-AFG3, and S-
With AFG4, set the focusing lens group Near edge detection flag NL.
NL = 0 is set, the focusing lens group Far end detection flag FL is set to FL = 0 in S-AFG5, and the process proceeds to S15 in FIG.

Further, in the processing of FIG. 42, the focusing lens group is driven in the Near direction by S-ANG1 to shift to S-ANG2. In this S-ANG2, the driving direction of the focusing lens group is not the Far direction, but the Near direction, so the flag AFDRVF that indicates that the driving direction of the focusing lens group is the Far direction is set to A.
FDRVF = 0 (Near direction), S-ANG3 sets the focusing lens group driving flag AFGO to AFGO = 1, and S-ANG4 sets the focusing lens group Near edge detection flag NL to NL = 0. S-
With ANG5, set the focusing lens group Far edge detection flag FL to F.
If L = 0, the process proceeds to S15 in FIG. 15. In this S15, it is determined whether or not the focusing lens group has been driven by the drive amount dp obtained in S11. If dp is driven and YES is determined, S20 To the focusing lens group
After the AF drive stop processing, the focusing lens group is stopped, and the process returns to S2 and loops. If NO, S16
To determine whether the drive pulse interval output from the AF pulser 48 is 100 msec or more, and NO (less than 100 msec).
If so, loop and repeat the judgment until YES (100 msec or more). When this pulse interval exceeds 100 msec, the focusing lens group stops driving and the AF
The friction clutch that links the motor M1 and the focusing lens group is in a slipping state. Therefore, when the pulse interval becomes 100 msec or more, the process proceeds to S17, AF end point processing is performed, and the process proceeds to S2 to loop.

[AF end point processing (FIG. 25)] The end point processing of S17 is shown in FIG.
It is performed as shown in. In this process, the AF-STOP process of FIG. 47 is performed in S-AFE1 as described above to stop the driving of the focusing lens group, and the process proceeds to S-AFE2. In this S-AFE2, the number of pulses dpx driven until the focusing lens group is stopped is calculated from the output of the AF pulser 48, and the S-AFE3
Move to In this S-AFE3, it is judged whether the driving direction of the focusing lens group is the Far direction, and if it is the Far direction, YE
S shifts to S-AFE12, and if it is in the Near direction, NO shifts to S-AFE4.

In this S-AFE4, the focusing pulse number Pinf of the focusing lens group is
It is replaced with a value obtained by adding the driving pulse number dpx obtained by S-AFE2 to the pulse number Pinf fed from the Far end, and the process proceeds to S-AFE5.

In this S-AFE5, the absolute value of the pulse number Pnear from the pulse number Pinf to the Near end of the focusing lens group obtained in S-AFE4 to the Far end to the Near end of the focusing lens group Plmt calculated from | Pinf-Pnear |
And shift to S-AFE6.

In the case of the end point detection, the number of pulses from the Far end to the Near end is known. Therefore, this may be set as the number of drive pulses of the focusing lens group toward the Near end, but for some reason And the focusing lens group
Since it may stop without being driven to the Near end, it is necessary to consider this case. On the other hand, the pulse number Pnear is a value known in advance from the lens, so if the focusing lens group hits the Near end, the result of subtracting Pinf-Pnear and taking the absolute value is It should be "0". Therefore, if the focusing lens group hits the Near end, the result of this subtraction must be "0", but considering that some error occurs, the result of the subtraction is If is within the allowable value, it is assumed that the focusing lens group hits the end point. The number of pulses Pnea
r is a value known in advance by the lens, and is stored in the lens ROM as fixed data in advance.

Therefore, in S-AFE6, it is judged whether the number of pulses at the end point is within the allowable value ε, that is, | Pinf-Pn.
If ear | is within the allowable value ε, YES is selected and the process moves to S-AFE10, and if it is outside the allowable value ε, NO is selected and the process is transferred to S-AFE7. Here, the allowable value ε means a pulse in a range in which the focusing lens group can be driven without error within this range, for example, 10 pulses. Then, in S-AFE7, the processing for driving the focusing lens group in FIG. 42 to the Near end side is performed to perform S-AFE8.
Move to

Here, this focusing lens group is Ne.
During driving in the ar direction, a drive pulse is output from the AF pulser 48, and this drive pulse is input to the lens CPU 44. Whether or not this drive pulse is output from the AF pulser 48 is determined by the S-AFE8. This judgment has a pulse interval of 10
It is performed for 0 msec or more or less, and if NO (less than), it loops until YES (more than), that is, until the end point is detected, and the determination is repeated. When this pulse interval becomes 100 msec or more, the focusing lens group is driven to the Near end and stops, and the friction clutch that links the AF motor M1 and the focusing lens group slips. It will be in the state of being. Therefore, when the pulse interval is 100 msec or more, YES (above) is entered, and the AF-STOP process shown in FIG. 47 is performed to proceed to S-AFE10. In this S-AFE10, the Near end detection flag NL of the focusing lens group is set to NL = 1.
As a result, the process shifts to S-AFE11, and in this S-AFE11, Pinf = Pnear is set, and the process shifts to S2 in FIG.

If YES (Far direction) is selected in the determination as to whether the driving direction of the S-AFE 3 is the Far direction, the process proceeds to the S-AFE 12,
In this S-AFE12, the focusing pulse number Pinf of the focusing lens group is set to the value obtained by subtracting the driving pulse number dpx obtained by the S-AFE2 from the pulse number Pinf of the focusing lens group extended from the Far end. Replace and move to S-AFE13.

In this S-AFE13, the absolute value of the pulse number Pinf to the Far end of the focusing lens group obtained in S-AFE12 |
Calculate Pinf-dpx | and move to S-AFE14. Here, the focusing lens group may stop without being driven to the Far end for some reason, so it is necessary to detect this case. On the other hand, if the focusing lens group hits the Far end, the absolute value of Pinf, that is, Pinf-dPx of S-AFE12.
The value [that is, the result of the subtraction of S-AFE12] when the absolute value of is taken should be "0". Therefore, if the focusing lens group hits the Far end, the result of this subtraction must be "0". However, considering this error, if this error is within the allowable value, the focusing is performed. Sing lens group hits the end point.

In this S-AFE14, it is determined whether or not the number of pulses at the end points is within the allowable value ε, that is, if | Pinf | is within the allowable value ε, YES is selected and the process proceeds to S-AFE18. If it is outside ε, NO is entered and S-AFE15 is entered. Then, in the S-AFE15, as described above, the focusing lens group has the Far lens shown in FIG.
The processing for driving to the end side is performed.

Here, this focusing lens group is Fa
While driving to the r end side, a drive pulse is output from the AF pulser 48, and this drive pulse is input to the lens CPU 44. Whether or not this drive pulse is output from the AF pulser 48
Determined by S-AFE16. This judgment has a pulse interval of 100 msec.
If NO (less than), the determination is repeated by looping until YES (more than), that is, until the end point is detected. When this pulse interval becomes 100 msec or more, the focusing lens group is driven to the Far end and stopped, and the friction clutch that links the AF motor M1 and the focusing lens group slips. It will be awake. Therefore, when the pulse interval is 100 msec or more, YES (or more) is selected and the AF-mode shown in FIG.
Perform STOP processing, shift to S-AFE18, set Far end detection flag FL of focusing lens group to FL = 1, and Pinf = 0 in S-AFE19.
Then, the process proceeds to S2 in FIG.

[AF drive stop (FIG. 24)] The AF drive stop processing of S20 is performed as shown in FIG. In this process, the AF-STOP process of FIG. 47 is performed in S-AFS1 as described above to stop the driving of the focusing lens group, and the process proceeds to S-AFS2. This S-AFS2
Then, the number of pulses dpx driven until the focusing lens group is stopped is calculated from the output of the AF pulser 48, and S
-Migrate to AFS3. In this S-AFS3, it is determined whether or not the driving direction is the Far direction. If YES (Far direction), the process proceeds to S-AFS11, and if NO (Near direction), the process proceeds to S-AFS4.

In this S-AFS4, the focusing pulse number Pinf of the focusing lens group is
It is replaced with a value obtained by adding the driving pulse number dpx (equivalent to dp) obtained in S-AFS2 to the pulse number Pinf extended from the Far end, and the process proceeds to S-AFS5.

In S-AFS5, the number of pulses at the end points is Pnea
It is determined whether it is smaller than r (within the range), and if YES (within the range), the process proceeds to S2 of FIG. 14, and if NO (out of the range), the process proceeds to S-AFS6. Then, in the S-AFS6, processing for driving the focusing lens group in the Near direction is performed as shown in FIG.

Here, this focusing lens group is Ne.
During driving in the ar direction, a drive pulse is output from the AF pulser 48, and this drive pulse is input to the lens CPU 44. Whether or not this drive pulse is output from the AF pulser 48 is determined by the S-AFS7. This judgment has a pulse interval of 10
It is performed for 0 msec or more or less, and if NO (less than), it loops until YES (more than), that is, until the end point is detected, and the determination is repeated. When this pulse interval becomes 100 msec or more, the focusing lens group is driven to the Near end and stops, and the friction clutch that links the AF motor M1 and the focusing lens group slips. It will be awake. Therefore, when the pulse interval is 100 msec or more, YES (above) shifts to S-AFS8 and performs AFSTOP processing shown in FIG. 47, shifts to S-AFS9, and the near end of the focusing lens group. Set the detection flag NL to NL = 1 and set S-AFS10 to P
With inf = Pnear, the process proceeds to S2 in FIG.

Further, when it is determined whether the driving direction of the S-AFS3 is the Far direction or not (YES in the Far direction) and the process proceeds to the S-AFS11, the S-AFS11 outputs the focusing pulse of the focusing lens group. The number Pinf is far focusing lens group Far
It replaces with the value which subtracted the drive pulse number dpx calculated by S-AFS2 from the pulse number Pinf sent from the end, and shifts to S-AFS12.

In this S-AFS12, the number of pulses P at the end points is
Judge whether inf is greater than 0 (out of range), and if YES (in range), move to S2 in FIG. 14, and if NO (out of range), in SA.
Move to FS13. Then, in the S-AFS 13, the processing for driving the focusing lens group in the Far direction of FIG. 41 is performed as described above.

Here, this focusing lens group is Fa
While driving in the r direction, a drive pulse is output from the AF pulsar 48, and this drive pulse is input to the lens CPU 44. Whether or not this drive pulse is output from the AF pulser 48
Determined by S-AFS14. This judgment has a pulse interval of 100 msec.
If it is NO (less than), it is looped until YES (above), that is, until the end point is detected, and the determination is repeated. When this pulse interval becomes 100 msec or more, the focusing lens group is driven to the Far end and stopped, and the friction clutch that links the AF motor M1 and the focusing lens group slips. It will be awake. Therefore, when the pulse interval is 100 msec or more, YES (above) is entered and the process proceeds to S-AFS15. And S-AF
In S15, the AFSTOP processing shown in FIG. 47 is performed and the process proceeds to S-AFS16. In this S-AFS16, the Far end detection flag FL of the focusing lens group is set to FL = 1, and in the S-AFS17, Pinf = 0 is set, and FIG.
Move to S2.

[Image magnification constant control] In S21 of FIG. 15, the image magnification constant mode switch SWPZC is turned on (turned on) as described above.
It is determined whether or not the flag MAGIMG for starting the constant image magnification control is set, that is, whether or not MAGIMG = 1. If the flag MAGIMG is MAGIMG = 1 and YES is selected, the process proceeds to S25, in which the focus display is turned off and the process proceeds to B in FIG. In FIG. 16 and FIG. 17, control is performed so that the image magnification is constant.

In S-B1 in FIG. 16, the constant image magnification control flag ONIMG is set to ONIMG = 1 (in control), and the process proceeds to S-B2. In this S-B2, the amount of extension x ₀ from the infinite end of the focusing lens group is calculated and the process proceeds to S-B3. In this S-B3, the current focal length information f ₀ of the zooming lens group is input. Move to S-B4. In the S-B4, the feeding amount of x ₀ is determined whether f ₀ / 0.99 or smaller. In this determination, the feeding amount x ₀ is f ₀ /
Whether it is smaller than 150 is a judgment as to whether or not the image magnification is too small for constant image magnification control.When the image magnification is too small, the change in image magnification due to the movement of the subject can be accurately measured. It cannot be detected. Therefore, in such a case, if YES, the process shifts to S-B18 to turn off the in-focus display, and at S-B19, a control disable signal is generated to notify that constant image magnification control is impossible, S-B20 sets the release permission flag SWREN to SWREN = 0, S-B21 sets the image magnification constant control flag ONIMG to ONIMG = 0 (not in control), and S-B22 a flag to start the image magnification constant control. MAGIMG to MAGI
With MG = 0, the process proceeds to S2 in FIG.

If the image magnification is not too small in the determination of S-B4, NO is selected and the process proceeds to S-B5. In this S-B5, the image magnification m ₀ = x ₀ / f ₀ is obtained, and the process proceeds to S-B6. In this S-B6,
The defocus amount dx is calculated and the process proceeds to S-B7. This S-B7
If it is YES (low contrast), the process proceeds to S-B23 to set the release permission flag SWREN to SWREN = 0, and in S-B24 the focus indicator is turned off and S
-Go to B1 and loop until the contrast is no longer low. This is for convenience of use by continuing the constant image magnification control when the subject returns to a predetermined position on the screen again, for example, even when the subject disappears from the screen or when the contrast is shifted laterally and the contrast is lowered. This is because.

On the other hand, if NO, the flow shifts to S-B8, where it is determined whether or not focus is achieved. If YES (focused), it means that the contrast is correct and the subject has not moved compared to the previous time, so move to S-B16 and set the release permission flag SWREN to SWREN = 1 (release permission). ), Shifts to S-B17, lights the focus display, returns to S-B1, and loops. On the other hand, if the judgment in S-B8 is NO (out of focus), the lens must be moved, so move to S-B9 and defocus amount.
The driving amount dp of the focusing lens group is calculated from dx and S-
Move to B10. In this S-B10, the focal length when the defocus amount dx is generated is obtained from the equation (7), and the process proceeds to S-B11. Here, the focal length f in equation (7) is f1. Let fW be the focal length at the Wide end of the focusing lens group and Te
If the focal length at the le end is ft, f1 must be within the range of fW <f1 <ft in order to perform constant image magnification control.
Therefore, S-B11 makes this determination. If f1 is not within the range of fW <f1 <ft, NO is selected and S-B25 is entered, the release permission flag SWREN is set to SWREN = 0, and focus is made at S-B26. The display is turned off and the process moves to E in FIG. In this E process, f1 is fW <f1 <ft
It is a process waiting for entering the range of.

If f1 is within the range of fW <f1 <ft in the determination of S-B11, YES is selected and the process proceeds to S-B12 to obtain the control image magnification γ = f1 / f ₀ and then to S-B13. To do. In the S-B13, the constants A, B, C for calculating the driving amount Pz of the zooming lens group are set to the lens R
Input from OM43 to lens CPU44 or main CPU6 to S-B14
Move to In this S-B14, the drive amount Pz of the equation (11) is calculated using the constants A, B, and C, and the process proceeds to S-B15. And S-B15
Then, it is judged whether dp = Pz = 0. If both are not 0 and NO, the figure
Move to 18 N. If both are YES, the process moves to S-B16, the release permission flag SWREN is set to SWREN = 1 (release permission), the process proceeds to S-B17, the focus indicator lights up, and the process returns to S-B1. Loop.

At least one of dp and Pz is 0 according to the judgment of S-B15.
If not, when shifting to N in FIG. 18, first the focus display is turned off in S-N1, and the release permission flag SWREN is set to SWREN in S-N2.
Set to = 0 and move to S-N3. In this S-N3, it is judged whether the driving amount dp of the focusing lens group is 0, and if it is 0, YE
S to S-N9. In this S-N9, it is judged whether or not the drive amount Pz of the zooming lens group is 0, and if 0, YES is selected.
Move to 9D.

If the drive amount dp is not 0 in S-N3, NO in S
Then, in S-N4, it is determined whether the driving direction of the focusing lens group is the Far direction. Then, if it is in the Near direction, NO moves to S-N5, and if it is in the Far direction, YES moves to S-N7. In this S-N5, the focusing lens group Ne
It is determined whether or not the ar end detection flag NL is NL = 1. When the end point is detected and NL = 1 is YES, the process returns to B in FIG. 16 to loop, and if NO, the process proceeds to S-N6. In S-N7, Far end detection flag F
Judges whether L is FL = 1, detects the end point, and if FL = 1, Y
At ES, the process returns to B in FIG. 16 and loops. If NO, the process proceeds to S-N8. Then, in this S-N6, the AFFARGO process for driving the focusing lens group in FIG. 41 in the Far direction is performed, and in the S-N8, the AF for driving the focusing lens group in FIG. 42 in the Near direction is performed.
Perform NEARGO processing and move to S-N9. In this determination of S-N9, it is determined whether or not the drive amount Pz is 0, and if not 0, the process proceeds to S-N10 with NO. In S-N10, it is determined whether or not the driving direction of the zooming lens group is the Tele direction. And Te
If it is the le direction, the process moves to S-N11 with YES and the PZTELEGO processing of FIG. 43 for driving the zooming lens group in the Tele direction is performed. If it is determined to be in the Wide direction by S-N10, the NO shifts to S-N12 to drive the zooming lens group in the Wide direction.
Perform DEGO processing.

In the PZTELEGO processing of FIG. 43, the S-PTG1 drives the zooming lens group in the Tele direction, and the S-PTG2 sets the Tele direction drive flag PZDRVT of the zooming lens group to PZDRVT = 1 (Tele
Direction) and use S-PTG3 to move the zooming lens group flag P
Set ZGO to PZGO = 1 (during driving). And S-PTG4 ~ S-PTG7
Then, the Tele edge detection flag TL, the Wide edge detection flag WL, the Near edge detection flag MNL by the driving of the zooming lens group in the macro area, and the Far edge detection flag MFL by the driving of the zooming lens group in the macro area are set to 0, respectively.
Move to D.

Further, in the PZWIDEGO processing of FIG. 44, the zooming lens group is driven in the Wide direction by S-PWG1 and Tele by S-PWG2.
Set the direction drive flag PZDRVT to PZDRVT = 0 (Wide direction), and set S-PW
In G3, the zooming lens group driving flag PZGO is set to PZGO = 1 (driving). Then, in S-PWG4 to S-PWG7, Tele edge detection flag TL, Wide edge detection flag WL, Near edge detection flag MNL by driving the zooming lens group in the macro area, Far by driving the zooming lens group in the macro area
The edge detection flags MFL are set to 0, and the process proceeds to D in FIG.

In the processing of D in FIG. 19, since the focusing lens group is in the zoom area, the end point is not detected and it always stops somewhere. Then, only the zooming lens group detects the end points. In the processing of D in FIG. 19, “(a) both the focusing lens group and the zooming lens group are not moving, (b) only the zooming lens group is moving and the focusing lens group is not moving. If (c) the zooming lens group is stopped and only the focusing lens group is moving, (d) both the focusing lens group and the zooming lens group are moving, and the focusing lens group comes first. And (e) both the focusing lens group and the zooming lens group are moving and the zooming lens group stops first. ”And the like. Hereinafter, each of these cases will be described.

[(A) When Both Focusing Lens Group and Zooming Lens Group Are Not Moving] S-D1 of FIG. 19
Then, the focusing lens group drive flag AFGO is AFGO = 1
If it is YES, move to S-D2, then N
If O, shift to S-D13. In S-D13, it is determined whether or not the zooming lens group drive flag PZGO is PZGO = 1 (during driving), and if NO, the process proceeds to S-D16. Then, in S-D16, the release permission flag SWREN is set to SWREN = 1, release permission and focus display are performed, and in S-D17, the drive stopping process of the focusing lens group in FIG. 24 is performed and the process proceeds to S-D18.

In this S-D18, it is judged whether or not the Far end detection flag FL of the focusing lens group is FL = 1 (end point detection), the end point is detected, and if YES, the flow shifts to B in FIG. Then, the process loops, and if the end point is not detected and the result is NO, the process proceeds to S-D19. SD
In 19, the near end detection flag NL of the focusing lens group
Is NL = 1 (end point detection), and if YES, B in FIG.
If it is NO without detecting the end point, S-D20
Move to

As described above, if NO in S-D18 and S-D19, the image magnification has become constant, so the focus display is lit in S-D20 and the release permission flag is displayed in S-D21. SWREN = SWREN =
Set to 0 and loop back to B in FIG. In addition, S-D18, S-D19
If YES, then the process returns to B in FIG. 16 and loops until the image magnification becomes constant.

[(B) When only the zooming lens group is moving and the focusing lens group is not moving] This diagram
19: Focusing lens group drive flag AFGO with S-D1
Determines whether AFGO = 1 (during driving), and if YES, shifts to S-D2, and if NO shifts to S-D13. In this S-D13,
It is determined whether or not the zooming lens group drive flag PZGO is PZGO = 1 (driving), and if YES, the process proceeds to S-D14. In S-D14, it is determined whether or not the zooming lens group is driven by the driving pulse number Pz and the driving is finished. If NO, the process returns to S-D1 and the zooming lens group is driven by the driving pulse number Pz. Loop up to. In this way, if the zooming lens group is driven by the number of drive pulses Pz, the determination in S-D14 is YES.
Move to S-D15 with (end of drive). In this S-D15, the processing for stopping the zooming lens group shown in FIG.
Go to 6. After that, the above-described processing of S-D16 to S-D21 is performed, the process returns to B in FIG. 16 and loops.

[(C) When the zooming lens group is stopped and only the focusing lens group is moving] In this case, in S-D1, the focusing lens group driving flag AF is selected.
When it is determined whether GO is AFGO = 1 (during driving), the process proceeds to S-D2 when YES (during driving). In this S-D2, it is determined whether or not the zooming lens group driving flag PZGO is PZGO = 1 (driving), and if NO (not driving), the process proceeds to S-D4. In S-D4, it is determined whether or not the focusing lens group has been driven by the number of pulses dp. Then, if YES, the flow shifts to S-D12, where the focusing lens group is stopped by performing the AFSTOP processing in FIG. 47, and the flow returns to S-D1 to loop.

If NO in the determination in S-D4, the process proceeds to S-D5. In this S-D5, it is judged whether the AF pulse output interval output from the AF pulser 48 is 100 msec or more, and NO (100 mse
(less than c) returns to S-D1 and loops until it reaches 100 msec or more, and when YES (100 msec or more), shifts to S-D6, and FIG.
The focusing lens group is stopped by performing AF STOP processing of, and the process proceeds to S-D7.

In S-D7, it is determined whether or not the zooming lens group driving flag PZGO is PZGO = 1 (driving). Then, if it is NO during driving, the process proceeds to S-D10, the end point process of FIG. 25 is performed, and then the process returns to B of FIG. 16 to loop.

[(D) When both the focusing lens group and the zooming lens group move and the focusing lens group stops first] In this case, in S-D1, the focusing lens group driving flag is set. When it is determined whether AFGO is AFGO = 1 (during driving), the process proceeds to S-D2 with YES (driving). This SD
In 2, the zooming lens group driving flag PZGO is PZGO = 1
It is determined whether (driving) or not, and if YES (driving), S-D3
Move to In this S-D3, it is determined whether or not the zooming lens group has been driven by the number of drive pulses Pz and the drive has ended. If NO, the process proceeds to S-D4. In this S-D4, it is determined whether or not the focusing lens group has been driven by the number of pulses dp, and if YES, the process proceeds to S-D12 and FIG.
After the focusing lens group is stopped by performing the AF STOP processing of (1) to return to S-D1, the processing of S-D13 to S-D19 is performed.

If NO in S-D4, the process proceeds to S-D5. In this S-D5, it is judged whether the AF pulse output interval output from the AF pulser 48 is 100 msec or more, and NO (100 mse
(less than c) returns to S-D1 and loops until it reaches 100 msec or more, and when YES (100 msec or more), shifts to S-D6, and FIG.
The focusing lens group is stopped by performing AF STOP processing of, and the process proceeds to S-D7.

In S-D7, it is determined whether or not the zooming lens group driving flag PZGO is PZGO = 1 (driving). Then, if YES during driving, the process proceeds to S-D8. In this S-D8, based on the pulse output from the PZ pulsar 49, it is determined whether or not the zooming lens group has been driven by the drive pulse number Pz and the drive has ended, and if NO, until the drive ends. If looped and if YES, the flow shifts to S-D9, the zooming lens group stop process of FIG. 48 is performed, and the flow shifts to S-D10. In S-D10, after the end point processing of FIG. 25 is performed, the processing returns to B of FIG. 16 and loops.

[(E) When both the focusing lens group and the zooming lens group are moving and the zooming lens group stops first] In this case, the focusing lens group driving flag AFGO of the S-D1 is set. When it is determined whether AFGO = 1 (during driving), the process proceeds to S-D2 when YES (during driving). In S-D2, it is determined whether or not the zooming lens group driving flag PZGO is PZGO = 1 (driving). If YES (driving), the process proceeds to S-D3. In this S-D3, it is determined whether or not the zooming lens group has been driven by the number of drive pulses Pz and the driving has ended. If YES, the process proceeds to S-D11 and the stop processing of the zooming lens group in FIG. 48 is performed. Once done, it moves to S-D4.

In this S-D4, it is judged whether or not the focusing lens group has been driven by the number of pulses dp. If YES, the flow shifts to S-D12 and the AFSTOP processing of FIG. Stop the single lens group and return to S-D1. When this AF STOP processing is performed, the focusing lens group drive flag AFGO is 0, so the determination in S-D1 is NO, and the processing in S-D13 to S-D21 described above is performed.

If NO in S-D4, the process proceeds to S-D5. In this S-D5, it is judged whether the AF pulse output interval output from the AF pulser 48 is 100 msec or more, and NO (100 mse
(less than c) returns to S-D1 and loops until it reaches 100 msec or more, and when YES (100 msec or more), shifts to S-D6, and FIG.
The focusing lens group is stopped by performing AF STOP processing of, and the process proceeds to S-D7.

In S-D7, it is determined whether or not the zooming lens group driving flag PZGO is PZGO = 1 (driving). Then, if it is NO during driving, the process proceeds to S-D10 to perform the end point processing of FIG. 25, and then returns to B of FIG. 16 to loop.

In the determination of S-B11 in the process of B of FIG. 16 described above, if the process shifts to S-B25 and S-B26, then the process shifts to E of FIG. In this E, when the constant image magnification control is out of the zoom area, "it is preferable for the next processing to move the zooming lens group to the end point rather than in the middle", so this determination is made.

First, it is determined whether the zooming lens group is the wide end or the Tele end by using f1. Moreover, since f1 is smaller than fw when f1 is smaller than ft, it is possible to calculate f1 and fw without judging both the relationship between f1 and ft and the relationship between f1 and fw.
If only the magnitude relationship with ft is determined, the magnitude relationship between f1 and fw can be determined at the same time.

Therefore, in S-E1 of FIG. 20, it is determined whether f1 is equal to ft or f1 is greater than ft, and f1 is
If it is equal to ft or f1 is larger than ft, it is on the Tele end side, so YES moves to S-E2.If f1 is smaller than ft, it is on the Wide end side and NO moves to S-E13. .

In S-E2, it is judged whether or not the Tele end detection flag TL of the zooming lens group is TL = 1 (end point detection). If the end point is detected, YES is selected and S-E7 is entered, NO is selected. If so, move to S-E3. In this S-E3, the zooming lens group in Fig. 43 is
Perform processing to drive in the le direction and move to S-E4. This S-
E4 is a process of continuously waiting for the end point detection of the zooming lens group. Then, if NO (less than 100 msec), loop until the drive ends and becomes YES, and YES (100 msec
If it is above), move to S-E5 and perform the ZOOM STOP processing in Fig. 48 to stop the driving of the zooming lens group and S-
Move to E6. In this S-E6, the zoom lens Tele
The edge detection flag TL is set to TL = 1 and the process proceeds to S-E7.

When the process shifts from S-E2 or S-E6 to S-E7, the defocus amount dx of the focusing lens group is calculated in S-E7, and the process shifts to S-E8. In S-E8, it is determined whether or not the subject has low contrast. If YES in low contrast, the process loops until there is contrast, and if there is contrast, NO is selected and the process proceeds to S-E9. In this S-E9, the amount of extension of the focusing lens group X ₀ is calculated and the process shifts to S-E10. In this S-E10, Xf = ft · m ₀ is calculated and the process shifts to S-E11.

In this S-E11, dx + X ₀ is Xf obtained in S-E10
Depending on whether or not it is larger, the image magnification m of the subject previously obtained
_It is judged whether or not it falls within the focal length of ₀ . Then, if it is within this focal length as a result of this determination, the result is YES and the process moves to S-E12 and S-
After replacing f ₀ with ft at E12, the process proceeds to S-B9 in FIG. 17 and driving is started. If the subject is farther than the focal length in the determination of S-E11, NO is selected and the process proceeds to P in FIG.

On the other hand, in the judgment of S-E1, when f1 is smaller than ft and is on the Wide end side, and the process shifts to S-E13 with NO,
First, in the S-E13, the wide edge detection flag W of the zooming lens group
Judge whether L is WL = 1 (end point detection). In this determination, if the end point is detected, the process proceeds to S-E18 with YES, and to S-E14 if NO. In this S-E14, processing for driving the zooming lens group in FIG. 44 in the Wide direction is performed, and the flow shifts to S-E15. This S-E15 is a process of continuously waiting for the zooming lens group to detect an end point. Then, if NO (less than 100 msec), the drive ends and loops until it becomes YES, and if YES (100 msec or more), the process proceeds to S-E16 and Z in FIG.
By performing the OOM STOP processing, the driving of the zooming lens group is stopped and the process moves to S-E17. With this S-E17, the Wide edge detection flag WL of the zooming lens group is set to WL = 1, and the S-
Move to E18.

When the process shifts from S-E13 or S-E17 to S-E18, the defocus amount dx of the focusing lens group is calculated in S-E7 and the process shifts to S-E19. In S-E19, it is determined whether or not the subject has low contrast, and if YES in low contrast, the process loops until there is contrast, and if there is contrast, the process proceeds to S-E20 with NO. In this S-E20, the amount of extension of the focusing lens group X ₀ is calculated and the process proceeds to S-E21. In this S-E21, Xn = fw · m ₀ is calculated and the process proceeds to S-E22.

In S-E22, it is determined whether or not the subject is within the focal length of the image magnification m ₀ obtained last time, depending on whether dx + X ₀ is smaller than Xn. By this judgment of S-E22,
If it is within this focal length, the process proceeds to YES with S-E23, and in S-E23, f ₀ is replaced with fw, and then the process proceeds to S-B9 in FIG. 17 to start driving. If the subject is closer than the focal length as determined by S-E22, NO is selected and the process shifts to P in FIG.

In S-P1 of FIG. 21, the driving amount dp of the focusing lens group is calculated from the defocus amount dx, and the process proceeds to S-P2. In this S-P2, it is determined whether or not the driving direction of the focusing lens group is the Far direction. If NO (Near direction), the process proceeds to S-P3, and if YES (Far direction), the S-P9 Move to. In this S-P3, it is judged whether or not the Near end detection flag NL of the focusing lens group is NL = 1, and if the end point is detected,
If YES, move to S-P8. If NO, move to S-P4. Further, in S-P9, it is determined whether or not the Far end detection flag FL of the focusing lens group is FL = 1, and if the end point is detected, YES
Then, S-P8 is entered, and if NO, S-P10 is entered. Then, in S-P4, processing for driving the focusing lens group in FIG. 42 in the Near direction is performed, and in S-P10, processing for driving the focusing lens group in FIG. 41 in the Far direction is performed, and S-P5 Move to.

In this S-P5, it is judged whether or not the focusing lens group has been driven by the driving amount dp. If the driving is completed, YES is selected and the process proceeds to S-P11. -Move to P6. In this S-P6, it is judged whether the pulse interval output from the AF pulser 48 is 100 msec or more, and NO (100 mse
If it is less than c), loop back to S-P5, and if YES (100 msec or more), move to S-P7. In this S-P7, the AF end point process of FIG. 25 is performed and the process proceeds to S-P8. In S-P11, the AF drive stop process of FIG. 24 is performed and the process proceeds to S-P8. And in S-P8,
It is determined whether or not the zooming lens group Tele end detection flag TL is TL = 1, and if the end point is detected, the process proceeds to S-E7 in FIG. 20 with YES, and to G in FIG. 20 if NO. Repeat the same thing.

[Timer interrupt processing (FIG. 26, FIG. 27)] S-T1 in FIG.
Then, disable the timer interrupt and move to S-T2. On the S-T2, the AF mode switch (switch SW AF A / M) is input (ON) to determine whether or not it is AF mode.If YES (AF mode), then S
-Move to T3, and if NO (manual), move to S-T15. On the S-T15, the power zoom mode switch SWPZ is ON
If it is ON, the process proceeds to S-T16 with YES, and if it is OFF the process proceeds to S-T19 with NO. And
In S-T16, set power zoom drive enable flag PZMODE to PZMODE =
Set to 1 (drivable), set the power zoom drivable flag PZMODE to PZMODE = 0 (not drivable) in S-T19, and proceed to S-T17. In S-T17, it is determined whether or not the auto-focusing flag AF is AF = 1 (during auto-focusing).
Move to K, and if NO, move to S-T18. In S-T18,
Perform the power zoom drive check in Fig. 31 to Fig. 33, and
Transition to H.

In S-H1 of FIG. 28, the release switch SWR is turned off.
Judgment is made as to whether or not it is N, and if it is ON, the process proceeds to S-H2 with YES, and if it is not ON, the process proceeds to S-H12 with NO. Then, in the S-H12, the lens storage check process of FIG.
-H13 is entered, and in S-H13, the power zoom drive check shown in FIGS. 31 to 33 is performed and then the operation is shifted to S-H14. In S-H14, the timer interrupt is permitted and the timer interrupt processing is ended.

When it is determined in S-H1 that the release switch SWR is ON and the process shifts to S-H2, whether or not the manual focus flag MF is MF = 1 (in manual focus) in this S-H2. Is judged. If manual focus is in progress, YES moves to S-H5, and if NO, SH
Move to 3. In this S-H3, it is judged whether or not the switch SWF S / C for focus / release priority switching is in focus priority (AFS), and if it is in focus priority (AFS), YES is selected and the process moves to S-H4. , Release priority
If it is (AFC), NO to move to S-H11. In this S-H11,
It is determined whether or not the image magnification constant flag ONIMG is ONIMG = 1 (while the image magnification is constant). If the image magnification is constant, YES is selected and the process proceeds to S-H4. If NO, the process proceeds to S-H5. In S-H4, it is determined whether or not the release permission flag SWREN is SWREN = 1 (release permission). If YES, the process proceeds to S-H5 with YES, and if NO-S-
The processing of H12 to S-H14 is performed and the timer interrupt processing is ended.

Then, in S-H5, it is determined whether or not the focusing lens group driving flag AFGO is AFGO = 1 (driving), and if it is driving, YES is selected and the process shifts to S-H6. For example, move to S-H10. In this S-H6, the driving stop processing of the focusing lens group is performed by performing the AF STOP processing shown in FIG.
In S-H7, in S-H7, the number of pulses dpx driven until the focusing lens group is stopped is counted from the output from the AF pulser 48, and the process proceeds to S-H8. In this S-H8,
Far direction drive flag AFDRVF of focusing lens group is A
Judge whether FDRVF = 1 (Far direction) or not, and if it is Far direction YES
Then, S-H15 is entered, and if NO, S-H9 is entered. Then Pinf is replaced with Pinf-dpx in S-H15 and Pin in S-H9.
Replace f with Pinf + dpx and move to S-H10. This S-H1
At 0, the drive of the zooming lens group is stopped by performing the ZOOM STOP processing of FIG. 48, and the processing shifts to either the release processing of Q in FIG. 29 or Q ′ in FIG.

[Release Processing] (1) Release Processing Q (FIG. 29) The release processing of FIG. 29 is such that while the drive mode is the continuous release mode (drive C), the release switch SWR is on The release process is continuously performed without driving the single lens group or the zooming lens group.

When the flow shifts to Q in FIG. 29, first, in S-Q1, the release process is performed to release the shutter of the camera and S-
The process moves to Q2, and in S-Q2, the lens storage check process of FIG. 37 is performed and then the process moves to S-Q3. With this S-Q3, drive switch
By operating the up switch SWUP or the down switch SWDOWN while operating SWDRIVE, the drive mode is set to drive C, that is, continuous release mode (mode in which release processing is continuously performed) or drive S, that is, single release mode (only once). Input any one of the modes (release processing is performed) and move to S-Q4. This S-Q4
Then, it is judged whether the drive mode is drive S,
If it is drive C, NO is followed by S-Q5, and if drive S is YES, then S-Q6 is entered. Then, in S-Q5, it is judged whether or not the release switch SWR is ON, and if it is ON, YES is returned to S-Q1 and the release process is continuously looped until OFF and then OFF. If so, shift to S-Q7 with NO. Also in S-Q6, it is judged whether or not the release switch SWR is ON, and if it is ON, YES is returned to S-Q2 and turned OFF.
It loops until it does, and if it's OFF, it shifts to S-Q7 with NO. In S-Q7, it is determined whether or not the photometric switch SWS is ON. If it is not ON, NO is selected and the process proceeds to the process of L in FIG. 36. If it is ON, YES is selected and the process proceeds to S-Q8.

In S-L1 of FIG. 36, the timer interrupt is first prohibited and the process proceeds to S-L2. In S-L2, the focusing lens group is stopped by performing the AFSTOP processing of FIG. 47 to S-L3. Move to. With this S-L3, the ONIM
It is determined whether G is ONIMG = 1 (during constant image magnification control) .If not under control, shift to S-L7 with NO.If under control, YES with S
-Move to L4. In this S-L4, the zooming lens group is stopped by performing the ZOOM STOP process of FIG. 48, and the process proceeds to S-L5. Further, in S-L5, the flag MAGIMG for starting the constant image magnification control is set to MAGIMG = 0, and the process proceeds to S-L6.
In L6, set the image magnification constant control flag ONIMG to ONIMG = 0 and S-
Move to L7. In this S-L7, release permission flag SWREN
SWREN = 0 (not allowed) and shifts to S-L8. In S-L8, AF correction flag AFCORR is set to AFCORR = 0 and shifts to S-L9. Then, the process proceeds to S-L10, the timer interrupt is enabled in S-L10, and the process returns to S2 in FIG.

Further, when the operation shifts from S-Q7 in FIG. 29 to S-Q8,
In this S-Q8, it is determined whether or not the autofocus flag AF is AF = 1 (autofocus is in progress). If autofocus is in progress, the result is YES in S-Q9, and if NO is in S-Q11.
Move to Also, in the S-Q9, the image magnification constant control flag
It is determined whether ONIMG is ONIMG = 1 (during constant image magnification control),
If not under control, move to S-Q11 with NO, and if under control Y
ES shifts to S-Q10. Then, in S-Q10, the timer interrupt is enabled and the process returns to B in FIG. In S-Q11, the timer interrupt is enabled and the process returns to S2 in FIG.

(2) Release process Q '(FIG. 30) In the release process of FIG. 30, when the drive mode is the continuous release mode (drive C) and the focus priority mode is set,
Regardless of whether the release switch SWR is ON or OFF, re-AF and constant image magnification control are performed before the release is permitted. That is, in the processing of SQ'5 and SQ'6, the release processing is performed by making a determination such as the AF mode or the focus priority mode.

In SQ'1 of FIG. 30, release processing is performed to release the shutter of the camera to shift to SQ'2.
In ‘2’, the lens storage check process of FIG. 37 is performed, and the process proceeds to SQ’3. In this SQ'3, the drive switch SWDRIVE
Up switch SWUP or down switch while operating
By operating SWDOWN, the drive mode is changed to either drive C, that is, continuous release mode (mode in which release processing is continuously performed) or drive S, that is, single release mode (mode in which release processing is performed only once). Enter and move to SQ'4. In this SQ'4,
Whether the drive mode is drive S or not is determined. If drive C, NO is selected and the process proceeds to SQ'5. If drive S, Y
ES shifts to SQ'7.

In this SQ'7, the release switch SWR is
It is judged whether N is ON or not, and if it is ON, YES is selected and SQ'2
Return to and loop until turned off, and if it is turned off, NO with SQ´9
Move to

Further, in SQ'5, it is judged whether or not the AF mode switch (switch SWAF A / M) is input (ON), and if it is ON, YES (AF mode) is selected and the process proceeds to SQ'6. OFF
If yes, move to SQ´8 with NO (manual). SQ'6
Then, determine whether the switch SWF S / C for focus / release priority switching is in focus priority (AFS).
If it is NO, move to SQ'8.

Then, in SQ'8, the release switch SW
It is judged whether or not R is ON, and if it is ON, YES means S-.
It returns to Q'1 and repeats the release process by looping until it turns off. If it is off, the process goes to SQ'9 with NO.

In this SQ'9, the release permission flag SWREN
SWREN = 0 and shift to SQ'10. In this SQ'10, it is determined whether or not the autofocus flag AF is AF = 1 (during autofocus). If autofocus is in progress, YES is selected and SQ'11 is entered. If NO, SQ ' Move to 13. Further, in SQ'11, it is determined whether or not the image magnification constant control flag ONIMG is ONIMG = 1 (during image magnification constant control), and if not under control, the process proceeds to SQ'12 with NO, indicating that control is in progress. If YES, go to SQ´13. Then, in SQ'12, the timer interrupt is enabled and the process returns to B in FIG. Also, SQ'13
Then, enable the timer interrupt and return to S2 in FIG.

As described above, in the case of manual judgment in S-T2 of FIG. 26, S-T15 to S-T18 and K of FIG. 35, H of FIG. 28, Q of FIG. 29.
Alternatively, the processing of Q ′ in FIG. 30 and L in FIG. 36 is performed. Also, this S-T2
If the AF mode switch (switch SW AF A / M) is ON in the judgment of YES, the process moves to S-T3 with YES (AF).

At S-T3, it is determined whether the focus priority mode is set or not. If the focus priority mode is selected, the process proceeds to S-T20. Then, in this S-T20, the focus priority mode flag AFS is set to AF.
As S = 1 (focusing priority), the process shifts to S-T7. On the other hand, if it is determined in S-T3 that the focus priority mode is not set, the process proceeds to S-T4 with NO. In this S-T4, the focus priority mode flag AFS is set to AFS = 0.
Then shift to S-T5. In this case, release is possible at any time, so release release flag SWREN is set to SWREN = 0 with S-T5.
After that, move to S-T6. This SWREN = 0 is
This is because AF processing is performed again even if the focus is moved midway after focusing. That is, even if the focus is once obtained in the focus priority mode, the focus state cannot always be detected, and if the mode is changed to another mode, the AF process needs to be performed again.

Further, there is also a taking lens which is out of focus when the zooming lens group is driven and zoomed after focusing. There is a varifocal lens as this photographing lens. With this varifocal lens, when the zooming lens group is driven to zoom, the focus shifts, so it is necessary to correct this focus shift. For this reason, in the focus priority mode, set this flag AFCORR to AFCORR = 1,
It is necessary to re-AF. However, since the focus priority mode is not set here, the focus error correction flag AFCORR is set on the S-T6.
Set AFCORR = 0 and move to S-T7.

In this S-T7, it is judged whether or not the photometric switch SWS is ON. If it is ON, YES is selected and the process proceeds to S-T9 without checking the AF bit. If it is not ON, NO is selected to S -Move to T8 and check the AF bit. In this S-T8, it is determined whether or not the autofocus flag AF is AF = 1 (during autofocus), and if it is during autofocus, the result is YES.
To L, and if NO, to S-T9.

In this S-T9, the power zoom switch SWPZ
Is determined to be ON, and if it is OFF, N
When it is O, it shifts to S-T21, and when it is ON, it shifts to S-T10 with YES. In the S-T10, the power zoom drive flag PZM
ODE is set to PZMODE = 1 (during driving) and S-T11 is entered.In S-T21, the power zoom driving flag PZMODE is set to PZMODE = 0 and S-T21 is set.
Move to T22. In this S-T22, the ZOOM STOP process of FIG. 48 is performed and the process proceeds to S-T23.

Here, regardless of whether the zoom switch SWPZ is ON or OFF, there is a possibility that the zooming lens group is manually moved to be in the macro area. Moreover, the zooming lens group is drive-controlled regardless of whether the zooming lens group is in the zoom region or in the macro region, but the drive control method differs depending on the region. Therefore, in S-T11 and S-T23, it is determined whether or not the macro switch is ON.

In this judgment of S-T23, the macro switch SWP is
If ZC is ON, YES is selected and S-T24 is entered. If ZC is not ON, NO is selected and S-T25 is entered. In S-T24, the macro area flag PZMACRO is set to PZMACRO = 1 (macro area), and in S-T25, the macro area flag PZMACRO is set to PZMACRO = 0 (zoom area), and the processing of H in FIG. 28 is performed.

Further, the macro switch is turned on by the judgment of S-T11.
If yes, move to S-T26 with YES, if not turn on with NO
Move to S-T12. In S-T26, the previous macro area flag
Whether or not PZMACRO is PZMACRO = 1 (macro area) is determined. If the area is the macro area, YES is selected and the processing proceeds to S-T30, and if the area is outside the macro area, NO is performed and the processing proceeds to S-T27. In this S-T27, the near edge detection flag MNL by the zooming lens group drive in the macro area is set to MNL = 0 and the process moves to S-T28. In the S-T28, the Far edge detection flag MFL by the zooming lens group drive in the macro area is set to MFL. = 0 and shifts to S-T29. In S-T29, macro area flag PZMACRO is set to PZMACRO = 1 (macro area) and S-T29 is set.
Move to T30. Since constant image magnification control cannot be performed in this macro area, in S-T30, the flag MAGIMG for starting constant image magnification control is set to MAGIMG = 0, and the flow shifts to S-T31. In this S-T31, the constant image magnification control flag ONIMG is turned on.
Judge whether IMG = 1 (during control), and if it is under control, set YES.
The process proceeds to L of 36 to stop the constant image magnification control, and if not under control, the process proceeds to S-T32 with NO. In this S-T32,
The power zoom drive check of FIG. 33 is performed, and the process shifts to H of FIG. 28 to perform the release process.

Also, when S-T11 shifts to S-T12, S-T1
Even in step 2, it is determined whether the previous macro area flag PZMACRO is PZMACRO = 1 (macro area).
Move to S-T33, and if outside macro area, move to S-T13 with NO. Then, in the S-T33, the macro area flag PZMACRO is set to PZ.
MACRO = 0 (outside the macro area, that is, the zoom area), and the processing shifts to K in FIG.

When S-T12 is transferred to S-T13, this S-T13
Then, it is determined whether or not the image magnification constant mode switch SWPZC is turned on. If it is not turned ON, NO is selected and the above S-
The processing of T30 and S-T31 is performed to shift to L in FIG. 36, and the constant image magnification control is stopped. If it is ON and YES, S-T14
Then, in this S-T14, the image magnification constant control start flag M
Set AGIMG to MAGIMG = 1 and move to H in FIG. 28 to perform release processing.

[Power zoom drive check (FIGS. 31 to 33)]
In the S-PD1 in Fig. 31, the power zoom mode switch SWPZ is
N to determine whether the power zoom drivable flag PZMODE is PZMODE = 1 (drivable), and if drivable, the answer is YES to S-PD2.
If it is impossible to drive, move to S-PD7 with NO. In this S-PD7, it is determined whether or not the zooming lens group is driven by the power zoom mechanism, that is, whether or not the zooming lens group drive flag PZGO is PZGO = 1 (driving), and if it is not driving. Move to the step next to the step where this power zoom drive check process is performed,
If it is driving, YES is selected and the process proceeds to S-PD8. In this S-PD8, the ZOOM STOP process of FIG. 48 is performed to stop the zooming lens group, and the process proceeds to S-PD17.

If it is determined in S-PD1 that the power zoom drivable flag PZMODE is PZMODE = 1 (drivable), YES is selected in S-PD1.
-Move to PD2. In this S-PD2, it is determined whether or not the constant image magnification control flag ONIMG is ONIMG = 1 (during control), and if control is in progress, YES is returned to the next step after the step in which the power zoom drive check process is performed. If it is NO, the process proceeds to S-PD3. In this S-PD3, it is determined whether or not the AF drive flag PZMGO by the power zoom mechanism in the macro area is PZMGO = 1 (during driving), and if it is during driving, the power zoom driving check process is performed with YES. The process proceeds to the step next to the step. If NO, the process proceeds to S-PD4.

In this S-PD4, the zooming lens group is Wid
It is determined whether or not the zoom switch SWPZW driven in the e direction is ON. If it is ON, the process proceeds to S-PD5 with YES, and to S-PD9 if NO. In this S-PD9, it is determined whether the zoom switch SWPZT that drives the zooming lens group in the Tele direction is ON. If it is ON, the operation proceeds to S-PD10 with YES, and if NO with S-PD7. Move to. In the S-PD5, it is determined whether the zooming lens group driving flag PZGO is PZGO = 1 (driving) .If it is not driving, NO moves to S-PD22.If it is driving, YES is selected. -Move to PD6. In the S-PD10 as well, the zooming lens group driving flag PZGO is PZGO = 1 (driving).
If it is not driven, the process proceeds to S-PD22 with NO, and if it is driven with YES, the process proceeds to S-PD11.

When the zoom switch SWPZW for driving the zooming lens group in the Wide direction is turned on and the zooming lens group is driven, it is inconsistent with the zooming lens group moving to the Tele side. Therefore, in the S-PD6, it is determined whether the Tele side driving flag PZDRVT of the zooming lens group is PZDRVT = 1 (driving to the Tele side), and if it is driving to the Tele side, it is inconsistent. In this case, YES is selected and the process proceeds to S-PD8 to perform the ZOOM STOP process for stopping the zooming lens group.

Further, when the zoom switch SWPZT for driving the zooming lens group in the Tele direction is turned on and the zooming lens group is driven, it is inconsistent with the zooming lens group moving to the Wide side. Therefore, even in the S-PD11, it is determined whether the Tele side driving flag PZDRVT of the zooming lens group is PZDRVT = 1 (driving to the Tele side), and if it is driving to the Wide side, it is inconsistent. If NO, go to S-PD8 and perform ZOOM STOP processing to stop the zooming lens group.

On the other hand, if it is not driven to the Tele side according to the judgment of S-PD6, there is no contradiction, so in this case, the process shifts to S-PD12 with NO, and it is driven to the Wide side according to the judgment of S-PD11. If not
If you are driving to the Tele side, there is no contradiction, so in this case also
If YES, move to S-PD12. In this S-PD12, PZ Pulsar 4
It is judged whether the interval of the pulse output from 9 is 100 msec or more.If it is less than 100 msec, the process moves to the step next to the step in which this power zoom drive check process is performed with NO, and if it is 100 msec or more. If YES, move to S-PD13.
In this S-PD13, the zooming lens group is stopped by performing the ZOOM STOP process of FIG. 48, and the process proceeds to S-PD14.
In this S-PD14, it is determined whether or not the Tele side driving flag PZDRVT of the zooming lens group is PZDRVT = 1 (driving to the Tele side), and if it is driving to the Tele side, YES is selected and the S-PD16 is selected. If it is driving to the Wide side instead of the Tele side, the process proceeds to S-PD15 with NO. And, in S-PD15, Wi of zooming lens group
The de edge detection flag WL is set to WL = 1, and the tele edge detection flag TL of the zooming lens group is set to TL = 1 in the S-PD16, and the process proceeds to S-PD17.

When the S-PD5, S-PD10 is transferred to the S-PD22, the AF correction flag AFCORR is set to AFCORR = 0 in the S-PD22, and the process is transferred to the S-PD23. In this S-PD23, it is determined whether the power zoom drive switch, that is, the zoom switch SWPZT, SWPZW is driving in the Tele side or the Wide side, and if the zoom switch SWPZT is ON, the S-PD23 Move to PD26, and if zoom switch SWPZW is ON, move to S-PD24.

In the S-PD24, the zooming lens group
It is judged whether the Wide end detection flag WL is WL = 1 or not, and the S-PD26 judges whether the Tele end detection flag TL of the zooming lens group is TL = 1. If both are YES, this power zoom drive check The process proceeds to the step next to the step in which the process is performed. If NO in the judgment of S-PD24 and S-PD26, the process proceeds to S-PD25 and S-PD27, respectively.

Then, in the S-PD25, the PZWIDEGO processing of FIG. 44 is performed to drive the zooming lens group in the Wide direction, and the S-PD25
At 27, the PZTELEGO processing of FIG. 43 is performed to drive the zooming lens group in the Tele direction, and the process proceeds to S-PD28.

With this S-PD28, the flag during auto focus
Determine whether AF is AF = 1 (during autofocus),
If it is during auto focus, the process moves to S-PD29 with YES.
Then, in this S-PD29, it is determined whether or not the switch SWF S / C for focus / release priority switching is in focus priority (AFS), and if it is in focus priority, the process proceeds to S-PD30 with YES. Also, this S-PD30
Then, the release permission flag SWREN is SWREN = 1 (release permission)
If the release is permitted, the process proceeds to S-PD31. Moreover, in this S-PD31, whether or not the taking lens 3 is a varifocal lens is determined based on the information stored in the lens ROM 43, and if the varifocal lens is YES.
Then shift to S-PD32. On the other hand, NO in the judgment of S-PD28 to S-PD31.
If so, the process proceeds to the step next to the step in which the power zoom drive check process is performed.

When S-PD31 is transferred to S-PD32, this S-PD31
With 32, the focal length PZST at the start of driving the zooming lens group
Store ARTF and move to S-PD33. In S-PD33, set release permission flag SWREN to SWREN = 0 (release not permitted) in S-PD35.
Then, in this S-PD35, set the AF correction flag AFCORR to AFCORR.
= 1 is set, and the process proceeds to the step following the step in which the power zoom drive check process is performed.

In addition, S-PD8 or S-PD15, S-PD16 to S-PD
When shifting to 17, the S-PD 17 determines whether or not the autofocus flag AF is AF = 1 (during autofocus), and if it is during autofocus, the process proceeds to YES with S-PD 18. Then, in this S-PD18, it is determined whether or not the switch SWF S / C for focus / release priority switching is in focus priority (AFS), and if it is in focus priority, the process proceeds to S-PD19 with YES. Also, S-PD19
Then, it is determined whether the AF correction flag AFCORR is AFCORR = 1, and YE
If S, move to S-PD20. In this S-PD20, the focal length PZENDF when the driving of the zooming lens group is stopped is stored, and the flow shifts to R in FIG. 34 or S2 in FIG. On the other hand, S-PD17 to S-PD1
If NO in the determination in 9, the process proceeds to the step next to the step in which the power zoom drive check process is performed.

In S-R1 of FIG. 34, the correction value PSTRT corresponding to the focal length PZSTART at the time of starting the driving of the zooming lens group is read from the lens ROM 43 to shift to S-R2, and in S-R2, the driving of the zooming lens group is stopped. The correction value PEND corresponding to the focal length PZENDF at the time is read from the lens ROM 43, and the process proceeds to S-R3. This correction value is the amount of focusing deviation due to driving of the zooming lens group when a varifocal lens is used as the taking lens. That is, the deviation amount (correction value) is, for example, as shown in Table 2 below.

[0189] Such a correction pulse (correction value n) can be changed by the lens design, and also changes depending on which of the reference values 0 is set to n _{1 to} n ₁₁ .

When S-R2 shifts to S-R3, the correction value PSTR when the zooming lens group is driven is changed in S-R3.
The subtraction result AFC obtained by subtracting the correction value PEND from the correction value PSTRT in order to see how much the T and the correction value PEND when the zooming lens group is stopped after this drive are deviated.
Search for R and move to S-R4. In this S-R4, the subtraction result A
Whether the FCR is “0” or not is judged, and if it is 0, it means that the subject is in focus, so YES means that the operation proceeds to S-R15. Then, in S-R15, the release permission flag SWREN is set to SWREN = 1, and the flow proceeds to S-R16. In S-R16, the focus display is turned on and the step next to the step in which the power zoom drive check process is performed is performed. Transition.

When the subtraction result AFCR shifts to S-R5 instead of 0 in the determination of S-R4, the subtraction result AFCR is set to dp as the focusing lens group driving amount in S-R5. In this case, since the driving amount is an absolute value, dp = | AFCR | and S-R6 is entered. In this S-R6, it is judged whether the subtraction result AFCR is positive or negative. If the result is positive, the result is YES and the process proceeds to S-R8.
Move to 7. Then, in the S-R7, the focusing lens group is driven to the Near side by performing AF NEARGO processing in FIG. 42, and in the S-R8, the focusing lens group is set to F by the AFFARGO processing in FIG. 41.
Drive to the ar end side and move to S-R9.

In this S-R9, it is judged whether or not the focusing lens group is driven by the driving amount dp. If the driving is not completed and NO is determined, the process proceeds to S-R10, and if YES is determined. Move to S-R12. Then, in this S-R10, it is determined whether or not the interval between the pulses output from the AF pulser 48 is 100 msec or more. If it is less than 100 msec, NO is returned to the S-R9 and looped. Then, when the pulse interval is 100 msec or more as determined by S-R10, the process proceeds to S-R11. In S-R11, the end point process of FIG. 25 is performed, in S-R12, the AF drive stop process shown in FIG. 24 is performed, and the process proceeds to S-R13.

With this S-R13, the focusing lens group N
It judges whether the ear edge detection flag NL is NL = 1. If NO, S
-Move to R14. In this S-R14, it is determined whether the Far end flag FL of the focusing lens group is FL = 1, and if NO, S
-Move to R15. Then, in S-R15, the release permission flag SWREN is set to SWREN = 1 and the process proceeds to S-R16. In S-R16, the focus display is turned on and the process proceeds to the step next to the step in which the power zoom drive check process is performed. If YES is determined in S-R13 and S-R14, the process proceeds to the next step in which the power zoom drive check process is performed.

[Lens Storage Check (Fig. 37)] S-LC1 in Fig. 37
Then the main SW (switch), that is, the lock switch SWLOCK is ON
If it is ON, the process proceeds to the step following the step in which the power zoom drive check process is being performed. If NO, S-LC2 prohibits timer interrupt and shifts to S-LC3. Figure 47 for this S-LC3
AF STOP processing stops the focusing lens group and shifts to S-LC4.
By performing OMSTOP processing, the zooming lens group is stopped and the process moves to S-LC5. With this S-LC5, it is judged whether the AF mode switch (switch SW AF A / M) is ON, and it is turned ON.
If it is AF and YES, S-LC6 is entered, and if NO (manual), S-LC14 is entered. Further, in the S-LC6, it is judged from the information stored in the lens ROM 43 in advance whether or not the focusing lens group is a type that can be stored, and if the type can be stored, YES is selected and the process proceeds to S-LC7. And if NO
Move to S-LC14.

In this S-LC14, it is judged whether or not the switch SWPZ for power zoom is ON, and if it is ON and YES, the process proceeds to S-LC15. With the S-LC15, the lens RO
Based on the information stored in advance in M43, it is determined whether or not the zooming lens group is a type that can be stored, and if it is possible, the process proceeds to S-LC11 with YES. On the other hand, if the switch SWPZ for power zoom is OFF and NO in the judgment of S-LC14, or if the zooming lens group is NO in S-LC15 instead of the type that can be stored, from V in FIG. 39 Move to S-U18, release the power hold with this S-U18, and finish.

When shifting from S-LC6 to S-LC7, in S-LC7 the focusing lens group is driven in the retracted direction to shift to S-LC8, and in S-LC8 the focusing lens group drive flag. Set AFGO to AFGO = 1 and move to S-LC9. This SL
In C9, it is determined whether or not the power zoom switch SWPZ is ON, and if it is ON and YES, the process proceeds to S-LC10. In this S-LC10, it is judged from the information stored in the lens ROM 43 in advance whether or not the zooming lens group is a type that can be stored.
Move to 1. In this S-LC11, the zooming lens group is driven in the direction in which it is retracted, and the process moves to S-LC12. In the S-LC12, the zooming lens group driving flag PZGO is set to PZGO = 1 and S-LC13
Move to

On the other hand, if the switch SWPZ for power zoom is OFF and NO in the judgment of S-LC9, or if the zooming lens group is S-LC10 and the zooming lens group is NO in the type that cannot be stored, S- Move to LC13. And S-LC12 or S-LC
9, When S-LC10 is moved to S-LC13, S-LC13 lens RO
The maximum storage time timer of the lens, which is stored in advance in M43, is activated and the process proceeds to U in FIG.

In FIG. 38, it is determined in S-U1 whether or not the focusing lens group driving flag AFGO is AFGO = 1 (driving). If not driving, the process proceeds to S-U7 with NO. If it is driving, YES is selected and the process proceeds to S-U2. In this S-U2, it is judged whether the AF mode switch (switch SW AF A / M) is ON,
If it is ON and AF is YES, the operation moves to S-U3, and if NO (manual), the operation moves to S-U4. The S-U3 determines whether the pulse interval output from the AF pulser is 100 msec or longer.If it is less than 100 msec, the process moves to S-U5 with NO, and if 100 msec or more, moves to S-U4 with YES. .

When S-U3 shifts to S-U5, the pulse count value AFP of the number of pulses output from the AF pulser is counted, and the shift shifts to S-U6.
Maximum value A that AFP can drive focusing lens group to maximum
It is judged whether it is smaller than FPmax, and if it is smaller, the answer is YES and S-U7.
To S-U4 with NO. And S-
At U4, the focusing lens group is stopped by performing the AF STOP process of FIG. 47, and the process proceeds to S-U7. This is because if the pulse while driving the focusing lens group output from the AF pulsar 48 continues to be output even if it exceeds the maximum value AFPmax,
This is because the battery is consumed so much that it is stopped in this case.

Then, in S-U7, it is judged whether or not the zooming lens group driving flag PZGO is PZGO = 1 (driving). If not driving, the process proceeds to S-U13 with NO, and if driving is under way. YES for S-
Move to U8. In this S-U8, it is determined whether or not the zoom switch SWPZ is ON. If it is ON, the process proceeds to S-U9 with YES, and to S-U10 if NO. In S-U9, it is judged whether the pulse interval output from PZ pulsar 49 is 100 msec or more. If it is less than 100 msec, NO is passed to S-U11.
If it is 0 msec or more, move to S-U10.

When S-U9 shifts to S-U11, the pulse count value PZP of the number of pulses output from the PZ pulser
The S-U12, the pulse count value PZP is the maximum value P that can drive the zooming lens group to the maximum value.
It is judged whether it is smaller than ZPmax, and if it is smaller, it is YES and S-U1.
Move to 3, and if NO, move to S-U10. And
In S-U10, the zooming lens group is stopped by performing the ZOOM STOP process of FIG. 48, and the process proceeds to S-U13. This is P
If the pulse output from the Z pulser 49 during zooming lens group drive continues to be output even if it exceeds the maximum value PZPmax,
This is because the battery is consumed so much that it is stopped in this case.

In S-U13, it is determined whether or not the focusing lens group driving flag AFGO is AFGO = 1, and if not driving, the process proceeds to S-U14 with NO. In this S-U14, it is determined whether or not the zooming lens group driving flag PZGO is PZGO = 1, and if it is not driving, the process proceeds to S-U18 with NO. And this S-U18
Press to cancel the power hold and finish.

If the focusing lens group is being driven and YES in S-U13, or if the zooming lens group is driving and YES in S-U14, S-U15
Move to Then, in S-U15, it is determined whether or not the storage time has ended, and if not, the process proceeds to S-U19 with NO. Then, in S-U19, it is judged whether or not the main switch, that is, the lock switch SWLOCK is turned on. If it is turned off, NO is returned to S-U1 to loop, and if it is turned on, YES is selected and K in FIG. Move to.

On the other hand, when S-U15 is shifted to S-U16, S-U1
In Fig. 6, the focusing lens group is stopped by performing the AF STOP processing in Fig. 47 and the process moves to S-U17. In S-U17, Fig. 48
ZOOM STOP processing stops the zooming lens group and shifts to S-U18. With this S-U18, power hold is released and the process ends.

In the embodiment of the present invention described above, as shown in FIG. 16, it is judged in S-B7 whether or not the contrast is low, and if the contrast of the subject is too low, Moves to S-B23 with YES, so J
Since S-B8 to S-B17 of FIG. 17 are not executed after step 2, the image magnification control is not completed and the image magnification control is prohibited.

Therefore, in this state, the movement of the zooming lens group by the image magnification control is not executed, and this does not cause wear of the drive mechanism of the zooming lens group or consumption of the battery.

In S-B23, since the release permission flag SWREN becomes 0, the release is also prohibited.

Then, in S-B23, the release permission flag SWREN
Is set to 0, the process returns from S-B24 to S-B1 and the operation loop of the defocus amount dX by S-B6 or the like is circulated until the contrast of the object is restored and waits.

As described above, the reason why the operation loop of the defocus amount dX is circulated to wait for the restoration of the contrast of the object is to keep the image magnification constant control in the continuous state for convenience of use. However, by calculating the defocus amount in accordance with the movement of the subject on standby, it is possible to quickly start the image magnification control operation after the restoration of the contrast.

In the embodiment described above, the example in which the zoom position is detected by the zoom code plate has been shown, but the invention is not necessarily limited to this. For example, Figure 49
As shown in FIG. 6, a position detecting reflection plate 64 extending in the circumferential direction may be fixed to the outer periphery of the base of the cam barrel 29, and a reflection type photodetector 65 may be arranged so as to face the reflection plate 64. The photodetector 65 has a light emitting element that emits light toward the reflecting plate 64 and a light receiving element that receives the light reflected by the reflecting plate. Moreover, as the reflecting plate 64, for example, a density changing type in which the density changes from one end to the other end as shown in FIG. 50 (A) may be used,
A bar code plate as shown in FIG. 50 (B) may be used.

Further, as shown in FIGS. 51 and 52, the cam cylinder 29
The electrode plate 66 fixed to the base of the
It is also possible to provide a condenser position variable type zoom position detecting means composed of an electrode plate 67 mounted on the side of the fixed frame 27 so as to be opposed to and to detect the zoom position from a change in electrostatic capacitance.

Further, as shown in FIG. 53, a variable resistance type zoom position including a resistance plate 68 fixed to the base of the cam barrel 29 in the circumferential direction and a brush 69 elastically contacted with the resistance plate 68. A detection unit may be provided to detect the zoom position from the change in resistance of the variable resistor.

Further, FIG. 54 conceptually shows the relationship between the power zoom mechanism and the pulsar used in the present invention. Here, it is assumed that this pulsar also serves as a zoom code plate and a PZ pulsar, but a zoom code plate may be provided in addition to this pulsar, and a pulsar and a PZ pulsar that replace the zoom code plate are used in combination. You can also

In FIG. 54, the gear 70 is provided at the base of the cam barrel 29, and the PZ motor M2 is made to interlock with the gear 70 via the reduction gear mechanism 71. This reduction gear mechanism 71 is
A gear 72 that meshes with the pinion 73 that meshes with the gear 72,
It has an idle shaft 74 to which the pinion 73 is fixed, and a gear 75 fixed to the idle shaft 74. Also, between the idle shaft 74 and the lens barrel side (not shown), a transmission type PZ
Pulsar 49 is installed. The PZ pulsar 49 has a slit plate 76 fixed to the idle shaft 74, and a photodetector 77 arranged on the peripheral edge of the slit plate 76. As shown in FIG. 55, a large number of slits 76a extending in the radial direction are formed in the peripheral edge portion of the slit plate 76 at equal pitches in the circumferential direction. Further, the photo detector 77 is arranged at a position where the light emitting element 77a and the light receiving element 77b sandwich the peripheral edge of the slit plate 76. The arrangement of the PZ motor M2 and the reduction gear mechanism 71 is not limited to the positions shown in the drawing, and may be appropriately arranged in consideration of other components.

As the PZ pulsar 49, a reflective type may be used instead of the transmissive type. Fig. 56, Fig. 5
7 shows an example of a reflection type pulsar.
In this example, a reflection plate 78 is fixed to the idle shaft 74, reflection surfaces 78a extending in the radial direction are provided on the reflection plate 78 at equal intervals in the circumferential direction, and the photodetector 52 is attached to the reflection plate 78.
A reflective photodetector 79 similar to the above is opposed.

Further, FIGS. 58 and 59 show another example of the reflection type pulsar. In this example, a multifaceted reflector 80 having a reflecting surface on the idle shaft 74 is fixed, and a reflective photodetector 81 similar to the photodetector 52 is opposed to the circumferential surface of the multifaceted reflector 80. Is.

[0219]

As described above, according to the first aspect of the invention, the image magnification control is prohibited when the contrast state of the subject is low and the reliability of the focus detection operation is low, so that it is useless. The variable magnification drive of the taking lens is prevented and the variable magnification drive control of the taking lens is stabilized.
The power consumption of the entire device can be reduced.

According to the second aspect of the present invention, the focus detection operation is executed and the reliability thereof is monitored even while the image magnification control is prohibited. Therefore, the reliability of the focus detection operation is restored. In that case, it becomes possible to quickly start the image magnification control.

[Brief description of drawings]

FIG. 1 is a control block circuit diagram of an image magnification control device for a camera according to the present invention.

2 is a circuit diagram showing in more detail a portion of a camera body side in the image magnification control device of the camera shown in FIG.

FIG. 3 is a circuit diagram showing in more detail a part on a photographing lens side in the image magnification control device of the camera shown in FIG.

4 is a schematic explanatory view showing an example of a movable mechanism section of a zooming lens group of the taking lens shown in FIG.

5 is an explanatory diagram of a zoom code plate in FIG. 4. FIG.

FIG. 6 is a schematic explanatory diagram showing a relationship between a subject and an image by a photographing lens.

FIG. 7 is a schematic explanatory diagram for explaining the principle of constant image magnification according to the present invention.

FIG. 8A is a three-dimensional change coordinate diagram showing a change in the focal position of the focusing lens group by zooming, and FIG.
It is explanatory drawing for demonstrating the meaning of the coordinate of (a).

FIG. 9A is a three-dimensional change coordinate diagram showing a change in the defocus amount of the focusing lens group due to zooming,
(B) is an explanatory view for explaining the meaning of the coordinates of (A).

FIG. 10 is an explanatory diagram showing a relationship between a zoom position of a zooming lens group and a K value.

FIG. 11 is an explanatory diagram showing the relationship between the zoom position of the zooming lens group and the focal length of the focusing lens group.

12 is an explanatory diagram of a correction curve in which the relationship between the zoom position and the K value of the zooming lens group illustrated in FIG. 10 is corrected.

13 is an explanatory diagram of a correction curve in which the relationship between the zoom position of the zooming lens group and the focal length of the focusing lens group in FIG. 11 is corrected.

FIG. 14 is a flowchart for explaining the operation of the image magnification control device for a camera according to the present invention.

FIG. 15 is a flowchart showing a series of operations at J1.

FIG. 16 is a flowchart continuing to B.

FIG. 17 is a flowchart showing a sequence that follows J2.

FIG. 18 is a flowchart showing a series of N's.

FIG. 19 is a flowchart continuing to D.

FIG. 20 is a flowchart continuing to E.

FIG. 21 is a flowchart continuing to P.

FIG. 22 is a flowchart continuing to I.

FIG. 23 is a flowchart showing a sequence of operations at M.

FIG. 24 is a flowchart showing a subroutine of AF driving stop.

FIG. 25 is a flowchart showing a subroutine of AF end point processing.

FIG. 26 is a flowchart showing a subroutine of timer interrupt processing.

FIG. 27 is a flowchart showing a process at J3.

FIG. 28 is a flow chart continuing to H.

FIG. 29 is a flow chart continuing to Q.

FIG. 30 is a flowchart showing a series of Q '.

FIG. 31 is a flowchart showing a subroutine of power zoom drive check.

FIG. 32 is a flowchart showing a J4 sequence.

FIG. 33 is a flowchart showing a series of steps J5 and J6.

FIG. 34 is a flowchart showing a sequence of steps R.

FIG. 35 is a flowchart showing a series of steps K;

FIG. 36 is a flow chart continuing to L.

FIG. 37 is a flowchart showing a subroutine of lens storage check.

FIG. 38 is a flowchart showing a sequence of operations in U.

FIG. 39 is a flowchart showing a series of steps of J7.

FIG. 40 is a flowchart showing a subroutine of initialization.

FIG. 41 is a flowchart showing a subroutine of AFFARGO.

FIG. 42 is a flowchart showing a subroutine of AFNEARGO.

FIG. 43 is a flowchart showing a subroutine of PZTELEGO.

FIG. 44 is a flowchart showing a subroutine of PZWIDEGO.

FIG. 45 is a flowchart showing a subroutine of MCRFARGO.

FIG. 46 is a flowchart showing a subroutine of MCRNEARGO.

FIG. 47 is a flowchart showing an AFSTOP subroutine.

FIG. 48 is a flowchart showing a ZOOMSTOP subroutine.

FIG. 49 is an explanatory diagram showing another example of the zoom position detection means for detecting the zoom position of the zooming lens group.

50 is a development view of the reflection plate shown in FIG. 49. FIG.

FIG. 51 is an explanatory diagram showing still another example of the zoom position detection means for detecting the zoom position of the zooming lens group.

52 is an explanatory diagram of the electrode plate of FIG. 51. FIG.

FIG. 53 is an explanatory diagram showing still another example of zoom position detection means for detecting the zoom position of the zooming lens group.

FIG. 54 is an explanatory diagram conceptually showing an example of the power zoom mechanism of the taking lens.

55 is a front view of the slit plate of FIG. 54.

56 is a front view showing another example of the PZ pulsar shown in FIG. 54. FIG.

57 is an explanatory diagram of the reflection plate in FIG. 56. FIG.

58 is an explanatory diagram showing still another example of the PZ pulsar shown in FIG. 54.

59 is a front view of the multifaceted reflector shown in FIG. 58. FIG.

[Explanation of symbols]

 M1 AF motor M2 PZ motor 3 Photographic lens 4 Camera control circuit 5 Lens control circuit 48 AF pulser 49 PZ pulser

Claims (2)

[Claims] 1. A variable magnification photographing lens, image magnification control means for calculating a control focal length of the photographing lens so that the image magnification of the subject is constant, and changing the focal length, and a contrast state of the subject. An image of a camera, which comprises: a contrast determining unit that determines whether or not the contrast determining unit determines that the contrast is low, and a inhibiting unit that inhibits the image magnification control by the image magnification controlling unit. Magnification control device. 2. The image magnification control device for a camera according to claim 1, wherein the image magnification control means detects a focus state of the photographing lens, and a focal length detects a focal length of the photographing lens. Detecting means, calculating means for calculating the control focal length based on the detection results of the focus detecting means and the focal length detecting means, and driving the photographing lens so as to match the focal length of the photographing lens with the control focal length. An image magnification control device for a camera, comprising: a driving unit, wherein the prohibiting unit repeatedly performs only a focus state detecting operation by the focal length detecting unit until the determination of low contrast is released.