JPH07120828A - Camera system - Google Patents

Abstract

PURPOSE:To provide a camera system capable of accurately displaying photographing information in accordance with the state of a camera. CONSTITUTION:This camera system is equipped with a camera body 10 inside which film 13 is arranged, a photographing lens barrel 30 attachably/detachably attached to the camera body 10 so as to form a subject image on the surface of the film 13, the operation ring 25 of an enlarging photographing device 20 attachably/detachably interposeed between the camera body 10 and the lens barrel 30 so as to change a distance between them, a resistance substrate 26 being a distance detection means detecting the distance between the camera body 10 and the lens barrel 30 changed by the operation ring 25, a liquid crystal display part 29 being a display means displaying the photographing information based on output from the distance detection means, and a control circuit 35 being a control means selecting a display mode in accordance with the state of the camera. The display mode of the display part 29 is changed in accordance with the state of the camera by the control circuit 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera system, and more particularly to a camera system for displaying photographing information based on the distance in a magnifying photographing apparatus for changing a relative distance between a photographing lens and a film surface. is there.

[0002]

2. Description of the Related Art Conventionally, in enlarging or close-up photography using a single-lens reflex camera, a light-shielding intermediate device such as an intermediate ring or a bellows is inserted between the camera body and the photographing lens barrel. It is common to be told. Such magnified shooting and close-up shooting are performed at a shooting magnification of about 0.2 to 12 times, and a lens having a focal length corresponding to each shooting magnification is used to change the length of the intermediate device. This is done by changing the distance between the camera body and the taking lens barrel.

In order to notify the photographer of information such as the photographing magnification when performing such magnified photographing or close-up photographing,
There has been proposed a magnifying photographing device in which the photographing information is displayed on a display device provided in the intermediate device or the like.

For example, the present applicant previously filed Japanese Patent Application No. 5-106.
No. 763 proposes a magnifying imaging device of this type. This is the focal length information and the principal point position information of the lens as the information of the photographing lens barrel, the distance information from the film surface to the body mount in the camera body as the information of the camera body, and the reference length of the magnifying photographing device as the magnifying photographing device information. The image pickup magnification is calculated by the calculation of the CPU from the measured information and the measured operation ring extension amount, and the image pickup information is displayed on the liquid crystal display unit.

A camera using such a magnifying apparatus uses a battery as its power source, so it is necessary to suppress the power consumption of the camera system as much as possible. Therefore, the sequential display mode (normal mode) capable of performing the various calculations and changing the display of the liquid crystal display unit
And a fixed display mode (power saving mode) in which the calculation function of the CPU is stopped to stop the display changing function of the liquid crystal display unit.

[0006]

However, in a normal case, it is required to display the photographing information based on the interval of the interval changing means in response to the operation of the interval changing means between the camera body and the taking lens barrel. However, the above-mentioned Japanese Patent Application No. 5-106
In the means proposed by No. 763, even when the interval changing means is operated in the mode (power saving mode) in which the screen display on the liquid crystal display is fixed, the screen display is fixed in the fixed mode. Up to this point, there is no display corresponding to the above interval change, and at this time there is a contradiction between the actual interval changed and set by the interval change means and the shooting information displayed on the screen of the liquid crystal display unit. was there.

An object of the present invention is to eliminate the inconsistent display as described above even in such a case, and perform accurate screen display of photographing information in accordance with each state of the camera and the screen display mode. The object is to provide a camera system capable of

[0008]

As shown in the conceptual diagram of FIG. 1, the present invention includes a taking lens 1, a film surface 2,
Interval changing means 3 for changing the distance between the photographing lens 1 and the film surface 2, an interval detecting means 4 for detecting the interval set by the interval changing means 3, and an operation for prohibiting / inhibiting the operation of the interval changing means 3 A prohibition means 5 for changing to the prohibition means, a prohibition / prohibition release detection means 6 for detecting a prohibition / prohibition release state of the prohibition means 5, and a display for displaying photographing information based on the detection value detected by the interval detection means 4. The display means 7 has a sequential display mode that can be changed in real time and a fixed display mode in which the display is fixed. When it is detected and the fixed display mode is selected, the display is turned off.

[0009]

The distance set by the operation of the magnifying photographing device, which is the distance changing means 3 for changing the distance between the photographing lens barrel and the camera body, is detected by the distance detecting means 4, and the detected information and the inside of the camera system are detected. The calculation is performed based on the various shooting information of. The value calculated by this calculation is displayed on the liquid crystal display unit, which is a display unit for displaying various kinds of photographing information, and at this time, the operation and the display mode of the magnifying photographing apparatus are detected. If it is determined that the liquid crystal display unit is in the fixed display mode, the screen display of the liquid crystal display unit is turned off.

[0010]

The present invention will be described below with reference to the illustrated embodiments. FIG. 2 is a central cross-sectional view showing a first embodiment of a camera to which the camera system of the present invention is applied, and shows the camera body, the magnifying photographing device, and the photographing lens barrel respectively in a separated state.

As shown in FIG. 2, a body mount 11 for connecting the magnifying photographing device 20 or the photographing lens barrel 30 is arranged in the center of the front part of the camera body 10. The magnifying imaging device 2
0 or an electric contact 12 for exchanging photographing information with the photographing lens barrel 30 is arranged. The CPU 14 arranged on the bottom surface of the camera body 10 is connected to the electric contact 12. In addition, a film 1 which is an image recording medium is provided at the rear of the camera body 10.
3 is mounted so that its film surface faces the front of the camera body 10 and is perpendicular to the optical axis.

The magnifying photographing device 20 is formed into a cylindrical body whose both ends are open. A mount 21 for detachably fitting the body mount 11 and connecting it to the camera body 10 is provided at the rear end of the magnifying and photographing apparatus 20 on the side facing the camera body 10. The mount 21 is provided with an electrical contact 22 that is connected to the electrical contact 12 of the camera body 10 to exchange photographing information and the like. On the other hand, a mount 23 for detachably connecting the taking lens barrel 30 is arranged at the front end of the magnifying taking device 20, and the mount 23 and the taking lens barrel 30 store the photographing information. Electrical contacts 24 are provided for replacement.

The operation ring 25, which is a space changing means formed by a double cylinder provided on the outermost peripheral portion of the magnifying and photographing apparatus 20, is a straight advance and rotation lock type operation ring.
This operating ring 25 is locked around the optical axis, for example, when it is rotated by an angle of 15 °, it is in a locked state, that is, the operating ring 25 is prohibited from operating, while it is rotated in the opposite direction by an angle of 15 °. Then, it is configured to be in a free state, that is, a released state in which the locked state is released. When the operating ring 25 is operated in the optical axis direction (front-back direction) in this free state, a voltage corresponding to the amount of extension and the amount of extension of the operation ring 25 causes a double-tube outer cylinder and inner cylinder of the operation ring 25. Output is made from the resistance substrate 26 which is the interval detecting means arranged in the space between the two.

Inside the magnifying and photographing apparatus 20, a CPU 27 is arranged at a position near the camera body 10.
The electric contacts 22 and 24 and the resistance substrate 26 are connected to the CPU 27 by a flexible substrate 28, which has a built-in memory for storing various data of the magnifying photographing device 20, and the camera body 10 and the photographing lens barrel 30.
The photographing information and the voltage value according to the amount of extension from the resistance substrate 26 are fetched, and the photographing magnification and the like are further calculated. The data value such as the photographing magnification calculated and calculated by the CPU 27 is connected to the CPU 27 by a flexible substrate 28, and a liquid crystal (LC) provided near the camera body 10 on the outer peripheral surface of the magnifying photographing device 20.
D) It is designed to be displayed on the display unit 29.

The photographing lens barrel 30 includes a camera body 1
0 or a lens mount 31 for connecting to the magnifying and photographing apparatus 20 is provided at the rear end portion of the side facing the camera body 10 or the magnifying and photographing apparatus 20. The lens mount 31 has an electrical contact 32 for connecting with the electrical contact 12 of the camera body 10 or the electrical contact 24 of the magnifying photographing device 20 to exchange photographing information with the camera body 10 or the magnifying photographing device 20. It is arranged.

At the center of the inside of the taking lens barrel 30,
A diaphragm mechanism 33 is arranged, and a pulse motor 34 and a control circuit 35 for driving the diaphragm mechanism 33 are arranged on the rear side of the outer peripheral side behind the diaphragm mechanism 33, and are connected to the electric contacts 32. This control circuit 35 uses the pulse motor 34.
And a built-in memory for storing various data in the photographing lens barrel 30 and exchanging photographing information with the camera body 10 and the magnifying photographing device 20 through the electric contacts 32.

Here, in the camera system thus constructed, the dimensions of the respective parts of its constituent members will be described. That is, the distance from the film surface of the film 13 in the camera body 10 to the front surface of the body mount 11 is L
b, the shortest length as the reference length of the magnifying photographing device 20 is L
c, the distance from the lens mount 31 of the taking lens barrel 30 to the lens principal point is Lu, and the distance from the lens principal point to the lens frame tip is Lm.

FIG. 3 is a schematic cross-sectional view showing a state in which the camera body 10, the magnifying photographing device 20 and the photographing lens barrel 30 which are separated from each other in FIG. is there.

As shown in FIG. 3, the object H0 when the operation ring 25 of the magnifying photographing device 20 is extended by the length Ld.
Let Lh be the distance from the lens to the tip of the lens, Lt be the distance from the subject H0 to the film surface H of the camera body 10, and β be the shooting magnification.

Β = (Lb + Lc + Ld + Lu−f) / f (1) Lt = f (1 + β) ² / β (2) Lh = f (1+ (1 / β))-Lm (3) That is, , Focal length f of photographing lens, distance Lu from lens mount 31 to lens principal point, distance Lm from lens principal point to lens frame tip, film surface H of camera body 10.
The distance Lb from the body mount 11 to the front surface of the body mount 11 and the shortest length Lc of the magnifying photographing device 20 are defined in advance, and if the output amount Ld of the operation ring 25 can be measured by the output voltage from the resistance substrate 26, the above (1) From the equation (3), the photographing magnification β, the distance Lt from the subject H0 to the tip of the lens, and the distance Lh from the subject H0 to the film surface H of the camera body 10 can be calculated.

FIG. 4 is a flow chart showing the processing of the CPU 27 in the magnifying photographing device 20 in the camera system of the first embodiment. The operation of the camera system of the first embodiment will be described with reference to FIG. 4 by showing concrete numbers. First, for example, the length Lb from the film surface H of the camera body 10 to the front surface of the body mount 11 =
With a 46 mm camera, a magnifying photographing device 20 with a minimum length Lc = 65 mm, and a photographing lens with a focal length f = 38 mm,
Length from lens mount 31 to lens principal point Lu = 4
4 mm, length from the lens principal point to the lens frame tip Lm =
A lens barrel 30 having a macro lens of 8 mm is mounted, and the extension amount Ld of the operation ring 25 of the magnifying photographing device 20 is Ld =
CPU 27 in the magnifying photographing device 20 when the distance is 10 mm
The process will be described.

In FIG. 4, in step S1, photographing information of the camera body 10 and the photographing lens barrel 30, that is, each of the above Lb, Lu, Lm, and f, is passed through the electric contacts 22 and 24 (see FIG. 2). Receive information. here,
As described above, Lb = 46 mm, Lu = 44 mm, L
m = 8 mm and f = 38 mm. Further, the camera body 10 also receives information on whether the state of the camera (mode) is the sequential display mode (normal mode) or the fixed display mode (power saving mode).

In step S2, the state of the camera is judged according to the information indicating whether the state of the camera is the sequential display mode or the fixed display mode in step S1, and the state of the camera is the sequential display mode. If determined, the process proceeds to step S3. On the other hand, when it is determined that the camera is in the fixed display mode, the process proceeds to step S10. First, the case where it is determined that the display mode is the sequential display mode will be described.

As described above, if it is determined in S2 that the display mode is the sequential display mode (normal mode), the process proceeds to S3. At S3, the output voltage of the resistance substrate 26 is set to A /
After the D conversion, the amount of extension Ld of the operating ring 25 is detected. Here, the operation ring 25 of the magnifying photographing device 20 is
As described above, Ld =
It becomes 10 mm.

In step S4, the various data Lb, Lu, Lm, f received in step S1, the data Ld detected in step S3, and the shortest magnification of the magnifying photographing apparatus 20 stored in the memory built in the CPU 27 are stored. From the length Lc,
Shooting magnification β, distance Lh from subject H0 to lens tip
Is calculated. Here, since Lc = 65 mm, the value of β is calculated by the above equation (1) as β = (46 + 65 + 10 + 44−38) /38=3.3. By substituting the calculated value of β into the equation (3), Lh = 38 × (1+ (1 / 3.3)) − 8 = 42, and the value of Lh is calculated.

In step S5, the calculation result calculated in step S4, that is, the photographing magnification β = 3.3 and the value of the distance Lh = 42 mm from the subject H0 to the front end of the lens are set in the liquid crystal provided in the magnifying photographing device 20. It is displayed on the display unit 29 (see FIGS. 2 and 3). For example, the screen display is a display as shown in FIG. In the display screen shown in FIG. D. Represents the distance from the subject H0 to the lens tip (work distance) = Lh. The state in which the calculation results are sequentially displayed on the screen is the sequential display mode.

In this way, the liquid crystal display unit 29 displays the step S4.
After the calculation result of (1) is displayed, the series of flow ends, and the process returns to step S1 again. Further, at this time, that is, during the screen display in the sequential display mode, the magnifying imaging device 2
When the feed amount Ld of the operation ring 25 of 0 is 3 mm from the above 10 mm.
If it is extended to 0 mm, then in S3 above, L
It is detected that d = 30 mm, and in S4, the photographing magnification β and the distance Lh from the subject H0 to the lens tip is β = (46 + 65 + 30 + 44-38) /38=3.9 Lh = 38 × (1+ (1 / 3.9) -8 = 40, and the photographing magnification β = 3.9 and the subject H at this time are calculated.
A value of distance Lh = 40 mm from 0 to the tip of the lens is displayed on the display screen of the liquid crystal display unit 29. That is, the liquid crystal display unit 2
The screen display of No. 9 is changed as shown in FIG.

Next, in step S2 of FIG.
A case where it is determined that the camera state is the fixed display mode (power saving mode) will be described. When it is determined in S2 that the camera is in the fixed display mode, the process proceeds to step S10 as described above. In S10, it is determined whether the operating ring 25 is in the locked state (prohibited state) or in the free state (prohibited release state).
Here, when it is determined that the state of the operation ring 25 is the locked state, the screen display of the liquid crystal display unit 29 is as shown in FIG.
There is no change as shown in (b), and the process directly proceeds to the next process of step S12. On the other hand, if it is determined that the operation ring 25 is in the free state, that is, if the screen display is in the fixed display mode, the process proceeds to step S11, and the screen of the liquid crystal display unit 29 at that time is displayed. The display is turned off (non-display mode) as shown in FIG.

At step S12, the same judgment as at S2 is made. That is, it is determined whether the state of the camera remains in the fixed display mode or whether the camera has returned to the sequential display mode. If it is determined that the camera is still in the fixed display mode, the process of step S12 is repeated until the display is returned to the sequential display mode. On the other hand, if it is determined that the sequential display mode has been returned, the series of flows is terminated and the process returns to step S1.

Here, in S12, as a means for returning from the fixed display mode to the sequential display mode, when the operation means on the camera body 10 side, for example, the release button or the mode change button is operated, the operation ring of the magnifying photographing device 20 is operated. The case where 25 is operated is mentioned. First, the former case will be described in detail. When a release button (not shown) provided on the camera body 10 is half-pressed, an interrupt signal is generated, and the CPU of the camera body 10
The control unit 14 returns from the fixed display mode to the sequential display mode, and at the same time, sends a return signal to the CPU 27 in the magnifying imaging apparatus 20 to return the CPU 27 from the fixed display mode to the sequential display mode.

The latter case will be described in detail. When the operation ring 25 of the magnifying photographing device 20 is unlocked, an interrupt signal is generated, and the CPU 27 in the magnifying photographing device 20.
Returns from the fixed display mode to the sequential display mode, and also transmits a return signal to the CPU 14 in the camera body 10 to return the CPU 14 from the fixed display mode to the sequential display mode.

As described above, in the first embodiment, when the camera is in the fixed display mode (power saving mode) and the operation ring 25 is in the free state, the liquid crystal display unit 29 displays. By turning the screen display off (OFF), that is, changing to the non-display mode, it is possible to eliminate the contradiction that the display does not change even though the operation ring 25 is operated.

In the first embodiment, the photographing magnification β,
The calculation of the distance Lh from the subject H0 to the tip of the lens is performed by the CPU 27 in the magnifying photographing device 20, but it can be performed by the CPU 14 in the camera body 10, and in that case, the same effect can be obtained. .

Next, a second embodiment of the camera to which the camera system of the present invention is applied will be described. FIG. 6 shows a CPU 27 in the magnifying photographing device 20 according to the second embodiment of the present invention.
It is a flowchart which shows the process of. The mechanical portion of the camera system of the second embodiment is constructed exactly the same as that of the first embodiment shown in FIGS. Therefore,
The description of the same components as those of the first embodiment is omitted because the description is duplicated, and only the operation will be described below with reference to the flowchart of FIG.

As shown in FIG. 6, first in step S21.
And the output voltage from the resistor substrate 26 (see FIGS. 2 and 3) is
The amount of extension Ld of the operation ring 25 of the magnifying imaging device 20 is detected by the / D conversion. Then, step S22
Then, communication is performed between the magnifying photographing device 20 and the camera body 10. That is, the extension amount Ld of the operation ring 25 of the magnifying photographing device 20 detected in S21 is transmitted from the magnifying photographing device 20 to the camera body 10. Then, from the camera body 10 side, whether the photographing information such as the photographing magnification β calculated and calculated in the camera body 10 and the camera state (mode) are the sequential display mode (normal mode),
Information is sent whether it is the fixed display mode (power saving mode).

Next, in step S23, whether the state of the camera received in step S22 is the sequential display mode,
It is determined whether the display mode is the fixed display mode. At this time,
If the state of the camera is determined to be the sequential display mode, the process proceeds to step S24, while if it is determined to be the fixed display mode, the process proceeds to step S30.

First, when it is determined in S23 that the state of the camera is the sequential display mode (normal mode),
As described above, the process proceeds to S24. In S24, the photographing magnification β received from the camera body 10 in S22
After displaying such data as the screen on the liquid crystal display 29,
The series of flows is completed, and the process returns to S21.

On the other hand, when it is determined in S23 that the camera is in the fixed display mode (power saving mode),
The process moves to S30. In S30, it is determined whether the operation ring 25 of the magnifying imaging device 20 is in the locked state or the free state. First, when it is determined that the operation ring 25 is in the free state, that is, when it is determined that the screen display is in the fixed display mode, the process proceeds to step S31. In step S31, after the screen display of the liquid crystal display unit 29 is turned off (non-display mode), step S31 is performed.
The process moves to 33. On the other hand, when it is determined that the operation ring 25 is in the locked state, the process proceeds to step S32.
In S32, the data such as the photographing magnification β received in S22 is displayed on the liquid crystal display unit 29, and the process proceeds to S33.

A step S33 decides whether the state of the camera is still in the fixed display mode or is returned to the sequential display mode. First, when it is determined that the state of the camera is still in the fixed display mode, the operation of S33 is repeated until the display mode is sequentially returned. On the other hand, if it is determined that the sequential display mode has been returned, the series of flows is terminated and the process returns to S21. The means for returning the state of the camera from the fixed display mode to the sequential display mode in S33 is exactly the same as in the first embodiment.

As described above, in the second embodiment, since the CPU 27 in the magnifying photographing device 20 does not perform the calculation based on the photographing information, the magnifying photographing device 20 can be made inexpensive.

In the second embodiment, the calculation of the photographing information is performed by the CPU 14 in the camera body 10. However, these calculations are performed by the control circuit 3 in the photographing lens barrel 30.
Alternatively, the same effect can be obtained in that case. Further, in this case, the processing of the CPU 27 in the magnifying photographing device 20 is exactly the same as that of the second embodiment described above.

By the way, in the above-mentioned first and second embodiments,
Shooting magnification β and the distance Lh from the subject H0 to the lens tip
Was calculated by the CPU and displayed on the screen of the liquid crystal display unit 29. However, other photographing information such as the range of the subject, the exposure multiple, the overall length of the bellows, and the distance from the subject H0 to the film surface H are displayed. It may be calculated and displayed on the screen. Further, the magnifying photographing device 20 may be provided with a screen display changeover switch of the liquid crystal display unit 29 so that the screen display can be changed over as shown in FIG.

Further, in the first and second embodiments described above, the cameras which can be separated into three parts such as the interchangeable photographing lens barrel 30, the magnifying photographing device 20, and the camera body 10 have been described. It is also possible to provide an integrated device in which the above are integrated or a two-divided type in which the interchangeable photographing lens barrel 30 has the intermediate accessory function of the magnifying photographing device 20 and is connected to the camera body.

Further, in the above-mentioned first and second embodiments, the method of rotating the operating ring 25 is adopted as the method of setting the operating ring 25 in the locked state or the free state. Separately, a push switch or a slide switch may be provided in the magnifying photographing device 20 to serve as a means for changing the locked state and the free state.

Furthermore, in the above-mentioned first and second embodiments, the resistance substrate 26 is used to detect the amount of extension Ld of the operating ring 25. By operating D / D conversion, the operation ring 2
It is also possible to detect the delivery amount Ld of 5.

Then, a modified example of the magnifying photographing device using a photo coupler as a means for detecting the amount Ld of extension of the operation ring 25 will be described with reference to FIG. This FIG. 8 shows such a magnifying imaging device 4
It is a center transverse cross section which shows the modification of 0.

In FIG. 8, the magnifying photographing device 40 is formed of a double cylindrical body, an outer cylinder 43a formed so as to cover the whole magnifying photographing device 40 on the outside, and an inner cylinder 43a on the inside. , And an inner cylinder 43b that moves in the optical axis direction and expands and contracts the entire cylinder length. In this modified example, the inner cylinder 43b is the operation ring 25 in the first and second embodiments described above.
It is a member having the same function as.

At the central bottom portion of the magnifying and photographing apparatus 40, a feeding knob 52 for moving the inner cylinder 43b in the optical axis direction.
Is provided, is fixed to the support shaft of the feeding knob 52, and the gear 53 is attached to the gear 53 that rotates integrally with the knob 52.
Gear trains 1, 41, and 42 mesh with each other, and the gear 42 meshes with a rack 44 provided on the outer peripheral surface of the bottom portion of the inner cylinder 43b to extend or retract the inner cylinder 43b in the optical axis direction. It is supposed to be crowded.

On the other hand, the gear 53 is composed of the gears 51, 45,
The notched disk 47 is rotated via a gear train 46. The cutout disk 47 has cutouts formed at equal intervals on the periphery, and a photocoupler 48 faces a part of the cutout. The photocoupler 48 is connected to the CPU 49. ing. The photocoupler 48 is adapted to convert the rotation amount of the cutout disk 47 into a pulse and input the conversion data to a CPU 49 connected to the photocoupler 48.

That is, the feeding amount and the feeding amount of the inner cylinder 43b are input to the CPU 49 as the number of pulses by the photocoupler 48. Further, the switch 50 disposed near the CPU 49 is an initial position reset switch of the inner cylinder 43b, and as shown in FIG. 8, the switch 50 is turned on in the shortest reference length state of the magnifying photographing device 40 ( It is turned on) and a reset signal is transmitted to the CPU 49. When the inner cylinder 43b is extended and the switch 50 is turned off (OFF mode) (non-display mode), the amount of extension Ld of the inner cylinder 43b of the magnifying imaging device 40 is detected. Therefore, the screen display is performed by the detected data as in the first and second embodiments.

In this configuration, that is, as the means for detecting the amount of extension of the inner cylinder 43b (operation ring 25) of the magnifying photographing device 40 as described above, the resistance substrate 26 of the first and second embodiments is used instead. Also as the photo coupler 48, the first,
The same effect as the second embodiment can be obtained.

[0052]

As described above, according to the present invention, the screen display is turned off in the mode in which the screen display of the liquid crystal display is fixed and when the interval changing means is in the free state. By doing (in hidden mode),
It is possible to solve the contradiction that the screen display does not change even if the interval changing unit is operated, and it is possible to provide a camera system capable of displaying accurate shooting information according to each mode.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a camera system showing the concept of the present invention.

FIG. 2 is a central cross-sectional view showing a first embodiment of a camera to which the camera system of the present invention is applied.

FIG. 3 is a central cross-sectional view showing a state in which the camera body, the magnifying photographing device, and the photographing lens barrel of FIG.

FIG. 4 is a CP of a magnifying photographing device in the camera of FIG.
The flowchart which shows the process of U.

5 is an example of a screen display of a liquid crystal display unit in the camera of FIG.

FIG. 6 is a flowchart showing processing of the CPU of the magnifying photographing device in the camera to which the camera system of the present invention is applied.

7 is an example of a screen display of a liquid crystal display unit of the camera shown in FIG.

FIG. 8 is a central cross-sectional view showing a modified example of the magnifying imaging apparatus in the above-described embodiment.

[Explanation of symbols]

 10 ... Camera body 11 ... Body mount 12, 22, 24, 32 ... Electrical contact 13 ... Film (image recording medium) 14, 27, 49 ... CPU 20, 40 ... Enlarge Photographing devices 21, 23 ......... Mount 25 ......... Operating ring (distance changing means) 26 ...... Resistance board (distance detecting means) 30 ......... Photographing lens barrel 31 ......... Lens mount 33 .... Aperture Mechanism 35 ...... Control circuit 48 Photo coupler (interval detection means)

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[Procedure amendment]

[Submission date] February 28, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (3)

[Claims] 1. A camera body in which an image recording medium is disposed, a taking lens barrel detachably attached to the camera body for forming a subject image on the image recording medium, the camera body and photographing. An interval changing unit, which is detachably interposed between the lens barrel and the lens barrel, changes an interval between the lens barrel and the lens barrel, and detects an interval between the camera body and the taking lens barrel changed by the interval changing unit. Means, a prohibition state in which the operation of the interval changing means is prohibited, and a release state in which the operation is cancelled, and display of imaging information based on the output of the interval detecting means. There is a sequential display mode that sequentially changes the display state according to changes in the shooting information that is being displayed, a fixed display mode that holds the currently displayed state, and a non-display mode that does not display. Camera system to a display unit freely selected, and a control means for selecting a display mode of the display means based on a state of said inhibit means, characterized by comprising a. 2. The control means changes the display mode of the display means to the non-display mode when the prohibition means is in the released state and the display mode of the display means is the fixed display mode. The camera system according to claim 1, wherein: 3. The control means sequentially changes the display mode of the display means to the display mode when the prohibition means changes from the prohibition state to the release state. Camera system.