JPH1051672A - Image pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain optimum automatic focus (AF) control by selecting the AF control mode corresponding to the set image pickup mode. SOLUTION: An incident light along with an optical axis AX is divided into a 1st optical path reaching a silver salt film C08 via a pellicle mirror C04 acting like a splitter means and a shutter C07 and into a 2nd optical path reaching an image pickup processing section C22 while being divided from the 1st optical path by the mirror C04 via a condenser lens C10, a reflecting mirror C11, an ND filter 13, a relay lens 14, a relay aperture 18, an optical low pass filter C16, an IR cut filter C17, and a CCD image sensor C21. The 1st optical path is an optical path for a film C08 and the 2nd optical path is an optical path for movie pickup. Then a mode changeover switch COP is used to set the silver salt image pickup mode, the video movie image pickup mode or the simultaneous image pickup mode of the both above. Thus, optimum AF control is attained in each of a plurality of the image pickup modes for a still image and a moving image.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image photographing apparatus represented by a handy type camera having both functions of a still camera and a video camera, and more particularly, to an auto-focusing apparatus for the same.
The present invention relates to an image capturing apparatus in which control (hereinafter referred to as AF) is improved.

[0002]

2. Description of the Related Art As a conventional camera with an AF function, an interchangeable lens camera is provided with a lens to which an AF sensor is attached, and the diameter of the lens (for example, F2.8 or the like) varies depending on the aperture.
A focus accuracy is achieved by switching the F control mode, that is, an AF control is changed according to a mounted lens aperture, and a focus accuracy is achieved by switching a passive AF sensor and an active AF sensor according to shooting brightness and a subject distance. Achievement, continuous AF and one-shot AF, switching by detecting whether the subject is moving or stopped, AF
The speed is slow at the time of the eye start and is fast at the time of the normal release button (S1).
There are known ones that can switch the area between wide and local, and ones that switch the AF control mode depending on the exposure mode (aperture priority mode, shutter priority mode, program mode, etc.).

[0003]

In recent years, a camera has been developed which has a function of photographing a silver halide photograph and a video movie, and performs photographing of a silver halide photograph alone / video movie alone. However, the camera does not have a shooting mode for simultaneously shooting both a silver halide and a video movie, and performs autofocus based on focus detection from a focus detection element for the silver halide.

A camera capable of simultaneously photographing a silver halide photograph and a video movie has been proposed. In such a camera, a mode in which silver halide photography is performed alone, a mode in which a video movie is photographed alone, It has multiple shooting modes such as a mode to shoot both silver halide and video movies at the same time, a mode to shoot still video, etc.
It is desired to perform auto-focusing optimal for each shooting mode.

The present invention is not limited to taking only silver halide photographs,
In addition, the present invention provides an image photographing apparatus having a plurality of still and moving image photographing modes such as simultaneous photographing of a video movie, a still video, a silver halide photograph and a video movie, and capable of performing optimal AF control for each of the modes. It is intended to do so.

[0006]

In order to achieve the above object, according to the present invention, there is provided a first imaging means employing a silver halide photographic method,
A second imaging unit using electrophotography, a first imaging mode for operating at least the first imaging unit to capture a silver halide photograph, and a second imaging mode for operating the second imaging unit to shoot a video movie. 2. An image photographing apparatus comprising: a photographing mode setting means capable of setting two photographing modes; and an AF control means, wherein the AF control means corresponds to the photographing mode set by the photographing mode setting means.
The F control mode is configured to be switched.

In the above configuration, the AF control means can be configured as follows. That is, one that can switch the AF speed according to the shooting mode, one that can switch between one-shot AF and continuous AF according to the shooting mode, and one that can switch the AF sensor according to the shooting mode In addition, those that can switch the control of the AF area depending on the shooting mode and those that can switch the emission control of the AF auxiliary light depending on the shooting mode can be cited.

[0008] With the construction of these AF control means, the present invention enables simultaneous shooting of a silver halide photograph, a video movie, a video movie and a silver halide photograph, and still video, and the AF sensor is controlled depending on the photographing mode. By switching, optimal AF control can be performed.

Further, in a system in which a main optical system, a light splitter, and a relay optical system are provided in an image photographing apparatus main body, the shortest photographing distance of the main optical system can be switched by a photographing mode. When shooting a video movie, the shortest shooting distance can be shortened and the shooting range can be expanded.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration diagram of the present embodiment. As shown in FIG. 1, the image photographing apparatus according to the present embodiment includes a camera body C, a main lens L, and a lighting and flash generating device (hereinafter, referred to as flash and light) F. In addition, a video imaging optical system and a silver halide imaging optical system, which will be described later, are configured by common components.

In the description of the present embodiment, C is attached to the camera body C side, L is attached to the main lens L side, and F
The COP is attached to the configuration of the operation unit COP provided on the camera body C side to facilitate comparison between the drawing and the description.

In this embodiment, the camera body C and the main lens L and the camera body C and the flash and light F are shown separately, but in the present invention, the camera body C and the main lens L , A camera body C and a flash and light F, or a combination of the three.
In addition, the video imaging optical system and the silver halide imaging optical system may be configured to be independent from each other.

FIG. 2 schematically shows the configuration of the optical system according to the present embodiment. In FIG. 2, light from a subject passes through a main lens L, the amount of light is controlled by a main lens aperture L11, and a pellicle mirror C04 functioning as an optical path dividing unit has a first optical path reaching a film C08 via a shutter C07 and a pellicle. The light is split from the first optical path by the mirror C04, and is split into a condenser lens C10, a reflection mirror C11, and a second optical path from the ND filter C13 to the relay lens C14. AX is an optical axis directed from the subject to the main lens L.

The amount of light from the subject that has passed through the second optical path and reached the relay lens C14 is controlled by a relay aperture C18, passes through an optical low-pass filter C16 and an IR cut filter C17, and functions as a photoelectric conversion unit.
The light reaches the CD image sensor C21. Although the CCD image sensor C21 is shown as a single plate in FIG. 2, a multi-plate type may be used.

The first optical path is an optical path for still photography using a silver halide film, and the second optical path is an optical path for movie photography using a video recording medium. As shown in the figure, on the camera body C side, silver halide photographing units C06 to C09 as first imaging means using a silver halide photography method.
And video signal photographing sections C21 to C27 as second image pickup means by electrophotography.

Returning to FIG. 1, first, the configuration of the main lens L will be described. L01 and L03 are operation rings that are rotated by the photographer's hand, L01 is a focus operation ring for operating a focus, and L03 is a focus operation ring. This is a zoom operation ring for operating the zoom. L13 is a fixed cylinder, L02 and L04 are operation ring state detection units for detecting rotation of the operation rings L01 and L03, respectively, and are usually constituted by encoders.

L05 is a focus detection unit for detecting the focal length of the main lens L, L06 is a lens microcomputer which is an operation control unit on the main lens L side, and L07 is a zoom microcomputer for performing a zoom operation of the main lens L. The motor L08 is a zoom motor monitor for detecting the rotation state of the zoom motor L07, and is composed of, for example, a photo interrupter.

L09 is a focus motor for performing a focus operation of the main lens L, L10 is an AF / MF switch button for switching between auto focus and manual focus, L11 is a main lens aperture, L1
Reference numeral 2 denotes a main lens aperture control unit. Main lens aperture control unit L
Reference numeral 12 includes a stepping motor for operating the aperture and an aperture state detection unit.

Focus and zoom operation rings L01, L0
Numeral 3 is rotatably fitted to the outer peripheral surface of the fixed barrel L13, so that it can rotate around the optical axis of the main lens L. Then, a power focus operation can be performed by rotating the focus operation ring L01, and a power zoom operation can be performed by rotating the focus operation ring L03.

Next, the configuration of the camera body C will be described. Reference numeral C01 denotes a camera microcomputer which is an arithmetic control unit of the camera body C, and communicates with the main lens L via a communication / power supply contact C30. To exchange information,
The flash operation control unit F is connected to the flash and write F via a hot shoe C20 as a flash contact.
01 and communicating information. FIG. 3 shows the appearance of a hot shoe C20 for mounting an external flash and a light.

Reference numeral C05 denotes an AF auxiliary mirror provided behind the pellicle mirror C04, and the main lens L
The light of the subject that has passed through is split by the pellicle mirror C04, passes through the first optical path, is further split by the AF auxiliary mirror C05, and is guided to the focus detection unit C02. The focus detecting section C02 transmits the focus information to the camera microcomputer C01, and the focus information processed by the camera microcomputer C01 is transmitted to the lens microcomputer L06. Motor L09
Is driven to perform focusing.

A shutter driving unit C06 controls opening and closing of the shutter C07 according to a command from the camera microcomputer C01. In other words, the camera microcomputer C01 uses the shutter drive unit C06 based on information from the operation unit COP, the luminance detection unit C12, and the like.
To the command signal. C08 denotes a silver halide film member, on the film surface of which a subject image is exposed by light obtained by opening and closing the shutter C07 through a first optical path, and forms a latent image. C09 denotes a film feed control unit that performs film feed and rewind by driving a built-in motor.

The light split by the pellicle mirror C04 and passing through the second optical path passes through the condenser lens C10, the reflection mirror C11, the ND filter C13, and the relay lens C14.
Optical system including the optical low-pass filter C16, I
CCD image sensor C via R cut filter C17
It is led to 21. The reflection mirror C11 is partially a semi-transmissive mirror, from which a part of the light is guided to the brightness detection unit C12 to detect the brightness of the subject.

Reference numeral C15 denotes an ND filter control unit, which is a silver halide film member C08 mounted in the camera body C.
The ND filter C13 is controlled by the ND density information set on the camera microcomputer C01 side based on the sensitivity difference between the CCD image sensor C21 and the brightness of the subject detected by the brightness detection unit C12. A relay diaphragm C18 is provided in the relay optical system, and a light amount guided to the CCD image sensor C21 is controlled by a relay diaphragm controller C1.
9 is controlled.

The CCD image sensor C21 receives a command from the camera microcomputer C01.
The light from the subject is photoelectrically converted by the drive pulse from the drive pulse generator C23. The photoelectrically converted electric signal is
After being sent to the imaging processing unit C22 and subjected to analog processing such as subsampling, it is A / D converted and sent to the image processing unit C24.

The image processing unit C24 includes a processing unit for converting γ, white balance (WB), and luminance / color difference (Y / C) signals, a memory unit for recording image data from the processing unit, and a camera unit. Microcomputer C01
An arithmetic control unit for performing image processing according to a command from
A memory unit for recording an image signal from the arithmetic control unit,
The image signal processed by the image processing unit C24 includes a viewfinder unit C27, a recording / reproducing unit C25, and an external output port also shown in FIG. It is sent to C32. In FIG. 1, the transmission line between the image processing unit C24 and the external output port C32 is omitted between a and a for convenience of display.

The viewfinder C27 comprises a finder comprising a liquid crystal finder and a CRT, and a converter for converting an image signal from the image processor C24 to drive the display, and displays images. Since the view finder section C27 shown in the figure is composed of a liquid crystal finder, it is hereinafter referred to as an EVF section. C35 is an operation display unit, which is a large liquid crystal display panel C3 shown in FIGS.
5A and a lamp C35B shown in FIG.
The information on the operation of the OP is displayed.

The recording / reproducing conversion unit C25 encodes the image signal from the image processing unit C24, the audio signal from the audio processing unit C31, and various signals from the camera microcomputer C01 into a recording format. send. C28 is a recording medium, which can use a magnetic tape, a magneto-optical disk, a solid-state memory (RAM), or the like.

Reference numeral C36 denotes a recording medium driving unit which drives a recording medium C28 such as a magnetic tape or a magneto-optical disk. The signal sent to the head section C26 is recorded on the recording medium C28 driven by the recording medium driving section C36. Similarly, data recorded on the recording medium C28 is read out by the head unit C26, decoded by the recording / reproducing conversion unit C25 to reproduce image signals, audio signals, and various signals, and transmitted to the image processing unit C24 and the audio processing unit C31. Send out. For convenience of explanation, in this embodiment, the recording medium C28 is represented by a cassette tape loaded with a magnetic tape, if necessary.

Audio is picked up by a stereo microphone C34 provided at an appropriate position in front of the camera body C as shown in FIG. 5, and is processed by an audio processing unit C31. The audio signal processed by the audio processing unit C31 is transferred to the recording / reproducing conversion unit C2.
5, the speaker C33, and the output port C32.
In FIG. 1, the audio processing unit C31 and the microphone C3
The transmission line between 4 and bb is omitted for convenience of display. C29 is a battery provided on the camera body C side, and supplies power to the camera body C and the main lens L.

Reference numeral C03 denotes a camera shake detection unit which detects a camera shake of the entire camera on which the main lens L is mounted, and transmits a detection signal to the camera microcomputer C01. The camera shake correction in the video signal photographing unit controls the read area of the CCD image sensor C21 based on this detection signal.

Next, the operation unit COP will be described with reference to the external views of the apparatus of this embodiment shown in FIGS. 3 to 6. In FIGS. 3 to 6, COP09 is an operation mode changeover switch also serving as a main switch. By operating the switch COP09, OFF, PM, Ph, M
Six operation modes, v, V, Sv, and E, can be selected.

That is, when the changeover switch COP09 is turned off, the entire apparatus can be turned off, and when the switch is set to PM, a video movie and a silver halide photograph can be simultaneously taken. , Ph in the silver halide shooting mode that can shoot silver halide
In v, a video movie shooting mode capable of shooting a video movie image, in V, a video playback mode for playing recorded video, in Sv, a still video shooting mode capable of shooting a video still image, and in E, a silver halide film member C08.
Each of the modes can be switched to an edit mode in which information recorded in the photographing information recording section is rewritten.

COP01 is a release button for photographing silver halide. COP02 is a switching dial that switches the aperture AV and shutter speed TV and switches the mode during shooting of silver halide and video. By turning this switching dial COP02 while pressing a mode button COP07 described later, You can select the shooting scene,
By turning the switching dial COP02 while pressing a program button COP12 described later, an A (aperture priority) mode, an S (shutter speed priority) mode, and an M (manual) mode can be selected.

COP03 is a deck open button for taking out a cassette tape C28 as a recording medium. By operating this button COP03, as shown in FIG. 7 and FIG. Can be attached and detached. The COP 04 functions as a fade button for starting a fade-out in the video movie shooting mode (Mv) and the simultaneous shooting mode (PM), and is used for a still image preview in the silver halide shooting mode (Ph) and the still video shooting mode (Sv). This is an operation button that functions as a trigger button.

The COP 05 uses the main lens L and the camera body C
This is a lens exchange button for removing from the lens. COP06
Indicates the silver halide shooting mode (Ph) and the still video shooting mode
A red-eye reduction button COP07 for setting an action for reducing red-eye when using the flash at the time of (Sv) is a mode button, and is used simultaneously with the above-mentioned mode switching dial COP02 to enable simultaneous shooting mode (PM), Silver halide shooting mode (Ph), video movie shooting mode (Mv)
In the still video shooting mode (Sv), it is used to set a scene select mode such as a portrait or a sports mode.

COP08 is a film cartridge exchange button for loading and unloading a film cartridge,
OP10 is a switch for changing the screen size during silver halide photography,
COP11 is a changeover switch for a video movie screen. The COP 12 is a program button, and when used alone, sets the shooting mode to a program. Also,
Simultaneous shooting mode (PM) and silver halide shooting mode (P
h), A (aperture priority) mode, S (shutter speed priority) mode, and M (manual) mode can be selected in the video movie shooting mode (Mv) and the still video shooting mode (Sv).

The COP 13 is a zoom button for changing the focal length of the main lens L, like the zoom ring of the main lens L. The COP 14 is a recording ON / OFF button for controlling start and stop of recording on the recording medium C28 in the simultaneous photographing mode (PM) and the video movie photographing mode (Mv), and a silver halide photographing mode (Ph) and still video photographing. In the mode (Sv), by pressing the above-mentioned operation button COP04 while pressing the button COP14, an image of the aperture open state can be displayed in the EVF. In the M (manual) mode, the button COP14 is pressed. While switching the above-mentioned switching dial COP02, A
V can be switched.

The COP 15 is an ON / OFF button for camera shake correction control in the simultaneous shooting mode (PM) and the video movie shooting mode (Mv), and is used in the silver halide shooting mode (Ph) and the still video shooting mode (Sv). Button COP15
When the mode switching dial COP02 is switched while pressing, exposure compensation can be performed.

The COP 16 is a first liquid crystal unit pop-up button. By operating this button COP 16, as shown in FIGS. 9 and 10, the liquid crystal unit constituting the EVF C27 pops out and the grip is locked. The EVF unit C27 can rotate around the camera body C together with the grip so that it can handle not only eye level but also waist level shooting.

A COP 17 is a flash forced light button in the silver halide shooting mode (Ph) and the still video shooting mode (Sv). The COP 18 is an ON / OFF button for displaying a message on the EVF unit C27. COP19
Are buttons for adjusting the volume in the V mode and the image on the EVF section C27 (brightness, hue, etc.).

The COP 20 is a second liquid crystal unit pop-up button.
As shown in FIG. 1, the liquid crystal unit constituting the EVF unit C27 rises in the vertical direction so as to correspond to the waist level photographing in the vertical position in the silver halide photography mode (Ph) and the still video photography mode (Sv). It has become.

The COP 21 is an auto-rewind button, and the button COP 21 enables the film to be rewound even in the middle of the film. COP 22 is a silver halide shooting mode (Ph),
A single shooting / continuous shooting / self-timer button for switching between single shooting, continuous shooting, and a self-timer in the still video shooting mode (Sv). 5 and 6, C4
Reference numeral 0 denotes a cover of the battery storage unit, and C41 denotes a tripod hole.

FIG. 12 shows an example of a large liquid crystal display panel C35A of the operation display section C35. This large liquid crystal display panel C35A
As shown, the camera operation mode display, tape running counter, date display, shutter speed display, exposure compensation display, red-eye reduction display, aperture value / exposure compensation value display, mode display, battery capacity display, self-timer mark, A film counter, a patrone mark, a wireless flash display, a winding mode display, a shooting scene select display, a manual focus display, and the like are provided.

The photographing scene select display is provided with switching buttons for arbitrarily selecting conditions such as portrait, commemorative photographing / scenery, close-up, sports, night view portrait / night view, and the like. Further, a lamp C35B shown in FIG. 5 emits light when a self-timer or red-eye reduction is performed.

In this embodiment, as described above, the photographing mode is the simultaneous photographing mode (PM), the silver halide photographing mode.
(Ph), the video movie shooting mode (Mv), and the still video shooting mode (Sv) can be switched among four modes, and various AF controls can be switched corresponding to these four shooting modes. ing.

[0047]

[Table 1]

Table 1 shows the AF control modes for each photographing mode. However, if the conditions for each shooting mode in Table 1 above are not satisfied in all the AF control items, the AF control
This does not mean that control cannot be performed, but means that control described in each item is performed in each shooting mode. For example, even if all AF sensors (detection methods) are performed by linear CCDs, desired AF control can be executed.

The items in Table 1 will be described. First, as shown in the AF speed column, the AF speed is
Switching is performed in accordance with each shooting mode. That is, in the silver halide shooting mode (Ph), a still image is shot, and as fast as possible an AF speed is required to quickly shoot a target object. In the video movie shooting mode (Mv), If the AF speed is too fast, the user will not be able to see the eyes when viewing the reproduced image, and the image will look strange. For this reason, during video movie shooting, the AF speed is made slower than during silver halide shooting. In the simultaneous shooting mode (PM), both slow speeds are used.

As for the precautions * 1, the AF speed depends on the focal length of the main lens L, the width of deviation from the focal point,
The absolute speed up to focusing differs depending on the AF detection method. However, the AF speed mentioned here is used to distinguish between an AF speed in silver halide photography or the like and an AF speed in video photography or the like. In other words, this means that even for the same camera, the AF speed is changed according to the shooting mode. Note that the AF speed in video shooting or the like is slow, but this slow speed is the speed at which a shot moving image can be viewed without discomfort.

Notes on simultaneous shooting mode (PM) *
Regarding 1-1, AF control is performed according to the shooting mode.
The F speed is switched. In the video movie shooting mode (Mv), "slow" control is performed, and the shutter speed is switched to the "fast" AF speed by half-pressing (S1 ON) the release button COP01 during silver halide shooting. That is, the AF speed at the time of shooting a silver halide film may be greater than the AF speed at the time of shooting a video movie.

Second, as shown in the one-shot / continuous column, one-shot AF and continuous AF are switched in accordance with the shooting mode. Here, the one-shot AF is an AF of a method in which once in focus, the in-focus state is locked to enable release, and conversely, if focus is not reached, release is disabled. On the other hand, the continuous AF is a method in which an AF operation is performed so as to continuously keep track of a subject, and even if the in-focus state is achieved, the state is not locked, and conversely, the release is possible even if the in-focus state is not achieved. . In the silver halide photographing mode (Ph), one-shot AF is mainly used to minimize out-of-focus photos. However, in the silver halide shooting mode (Ph), not only the one-shot AF but also the continuous AF is automatically switched to the continuous AF according to the shooting mode, so that a photo opportunity is not missed.

In the video movie shooting mode (Mv) or the simultaneous shooting mode (PM), since the movie shooting is mainly performed, the continuous AF that always follows the subject is used.
Is adopted. This makes out-of-focus photos in silver halide photography,
In movie shooting, it is possible to reduce out-of-focus.

Third, as shown in the column of the AF sensor (detection method), the AF sensor is switched according to the photographing mode. That is, in the silver halide shooting mode (Ph), C
Focus detection is performed by phase difference detection by a CD line sensor, and focus detection is performed by a CCD area sensor in a movie shooting mode. In the simultaneous shooting mode (PM), focus detection is normally performed by a CCD area sensor, and focus detection is performed by phase difference detection by a CCD line sensor when a release button is half-pressed (S1 ON). The focus adjustment of the video imaging optical system and the silver halide imaging optical system main optical system is performed by controlling the main optical system.

By switching the AF sensor in the photographing mode as described above, especially when the relay optical system is used in the SLR system, or when the lens for the silver halide and the lens for the video are separately configured, the focus accuracy is improved. That is, since the depth of field is greatly different between a silver halide photograph and a video image, unnecessary AF operations are not performed by using an AF sensor for a video image for a video movie and an AF sensor for a silver halide photograph for a silver halide photograph. And energy saving can be achieved.

Regarding the precautions * 2, the conventional AF sensor for a silver halide camera (SLR camera) is a linear CCD using a phase difference method, and in a video movie, the output from an image sensor (area CCD) is used. Although a method of extracting the AF information based on the contrast information is employed, in the present embodiment, both AF sensors are provided, and therefore, it is possible to selectively use them. Regarding the precautions regarding simultaneous shooting mode (PM) * 2-1,
In the video movie shooting mode (Mv), AF control by the area CCD is performed, and when the release button COP01 is half-pressed (S1 ON) during silver halide shooting (Ph), the linear CC is set.
Re-ranging by D is performed. In addition, the conventional C
In the contrast detection method using a CD, a focusing direction is detected by driving a lens or the like, but in the present case, since the phase difference detection method is used, it is possible to detect the focusing direction and measure the distance.

Fourth, as shown in the AF area column, the control of the AF area is switched depending on the shooting mode. That is, in the silver halide shooting mode (Ph), switching between the wide focus area and the local focus area is possible, and in the video movie shooting mode (Mv), the wide focus area is set.

In the silver halide photographing mode (Ph), a still image may be photographed by holding the camera slowly instead of snap photographing. In such a case, it is necessary to have a local focus area so that a certain portion comes into focus. However, in a video movie shooting mode (Mv) or the like, since the subject is constantly moving, it becomes rather complicated to have a local focus area. Therefore, as described above, AF
By switching the area, it is possible to easily shoot.

As for the note * 3, the AF area largely depends on the configuration of the AF sensor. For example, in the case of an area CCD, a wide focus area covers the entire screen, but in the case of a linear CCD, a position at which a sensor can measure a distance is determined. Actually, even when an area CCD is used, only about half of the area at the center of the screen is targeted.
In the case of D, a slightly narrower portion is the target of the wide focus area. As for the local focus area, a local focus area can be arbitrarily set in an area CCD, but a linear CCD can be set.
In the case of (1), the target range of the area is determined by the arrangement of the linear CCD.

Regarding the note * 3-1 regarding the simultaneous shooting mode (PM), the video movie shooting mode
At the time of (Mv), AF is performed in the wide focus area by the area CCD, and when the release button COP01 is half-pressed (S1 ON) in the silver halide shooting mode (Ph), the linear C
Re-ranging is performed in a wide focus area or a local focus area using a CD.

Fifth, as shown in the column of lighting of AF auxiliary light at low luminance, emission control of AF auxiliary light is switched according to a shooting mode. That is, the silver halide shooting mode
At (Ph), emission of AF auxiliary light is permitted at low brightness, and emission of AF auxiliary light is not permitted at video movie shooting mode (Mv) and simultaneous shooting mode (PM).

In the silver halide shooting mode (Ph), even if the AF auxiliary light is used for focus detection, the auxiliary light is not affected during shooting, but in the video movie shooting mode (Mv), the AF auxiliary light is used. When light is emitted, a shadow of the AF auxiliary light appears on the recording screen. For this reason, video movie shooting mode
In the case of (Mv) or the simultaneous shooting mode (PM), the light emission is prohibited, so that the occurrence of shadow can be eliminated.

FIG. 13 shows A in the simultaneous shooting mode (PM).
The F control operation will be described. In step # 1, the simultaneous shooting mode (P
When M) is set, the area CCD is activated in step # 2, and the contrast detection of the subject is started in step # 3. In step # 4, a wide focus area is selected as the AF area. In step # 5, priority is given to video movie shooting, and lens driving is performed by controlling the AF speed to be "slow". When the video movie shooting is performed without operating the silver halide shooting release button COPO1 in step # 6, the recording is started in step # 7 with the above settings.

On the other hand, in step # 6, when the release button COPO1 for silver halide photography is operated and half-pressed (S1), in steps # 8 to # 10, the linear CCD as the AF sensor widens the phase difference detection. Starting at the focus area, the lens driving is also switched to the AF speed “fast”. Control to focus again. If the in-focus state cannot be detected in step # 11, step # 1
2 switches to the local focus area. In step # 13, the release button COP01 is further pressed (S
2ON), and film shooting is performed in step # 14.

At step # 7, recording by video movie shooting is started, and at step # 15, the release button COP0
When the half-press of 1 (S1ON) is performed, steps # 16-
In # 22, silver halide photography is performed in the same procedure as in steps # 8 to # 14. After the start of the recording and after the end of the silver halide shooting, when the recording is finished in step # 23, step # 4
Return to

Incidentally, in this type of image photographing apparatus, there is a difference between the optical performance required for silver halide photography and the optical performance required for electrophotography. Many are due to optical performance. That is, in the MTF curve described later, the silver halide photographing mode
(Ph) When the shortest shooting distance is set so as to satisfy the performance at the time of execution, in shooting a video movie, not only the quality is excessive, but also the operability due to being away from the subject poses a difficulty. On the other hand, if the shortest photographing distance is set so as to satisfy the performance of electrophotography, there is a contradictory problem that the quality of silver halide photography deteriorates.

Therefore, in this embodiment, the shortest photographing distance of the main optical system can be switched depending on the photographing mode. First, the shortest photographing distance of the main lens L will be described. For example, the distance at which an SLR interchangeable lens or a non-exchangeable lens of a compact camera cannot be photographed any closer is the so-called shortest photographing distance. Usually, the distance from the film surface to the subject is referred to as a photographing distance, and the shortest photographing distance refers to the shortest distance that can be photographed among them. Since a video camera or the like does not have a concept of a film surface or a detection unit of a CCD image sensor, the shortest photographing distance may be determined by the distance from the lens tip.

A factor that determines the shortest photographing distance is that as the photographing distance becomes shorter, the spherical aberration and the field curvature increase, and as a result, the MTF (Modulation Transfer Function) decreases. MTF is a function that simultaneously indicates contrast and resolution. FIG. 14 shows an example of F1.
7 Shows the relationship between the MTF and the shooting distance at full aperture. For example, when taking a silver halide photograph, if the image quality of a silver halide photograph cannot be secured if the contrast of 20 lines / mm is 0.6 or less, the shortest photographing distance is determined to be 50 cm. However, in video movie shooting with a lower resolution than silver halide photography, if a good image quality can be obtained if the contrast of 10 lines / mm is 0.4 or more, the shortest shooting distance is
It can be determined to be 10 cm. in this way,
In the present embodiment, since the shortest photographing distance that is optimal for each of the silver halide photograph and the electrophotograph can be set, the above problem can be solved.

Specifically, the shortest shooting distance in the silver halide shooting mode (Ph) is set to Dag, and the video movie shooting mode (M
When the shortest photographing distance at the time of v) is Dmv, Dag> Dmv. Also, when the shortest shooting distance in the simultaneous shooting mode (PM) is Dam, Dam = Dag. This makes it possible to take a silver halide photograph having no problem in image quality even in simultaneous photographing. Furthermore, by setting Dam = Dmv, it is possible to provide a shooting environment that does not cause a sense of discomfort in video movie shooting (Mv) in the simultaneous shooting mode (PM).

In the image photographing apparatus according to the present embodiment, a silver halide photograph is photographed in the silver halide photographing mode (Ph) using the main lens L as a photographing lens. In the video movie shooting mode (Mv) or the still video shooting mode (Sv), video shooting is performed, and further, the simultaneous shooting mode (Pv) is performed.
In M), both types of photographing can be performed. Therefore, the optimum photographing environment is realized in each photographing mode by changing the setting of the shortest photographing distance in each photographing mode.

In the following description, it is assumed that the main lens L in FIG. 1 has a minimum shooting distance of 50 cm in silver halide photography over the entire zoom range and a minimum shooting distance of 10 cm in video movie shooting. The main lens L
Is assumed to correspond to the shortest photographing distance of 10 cm.

First, the operation in the silver halide photography mode (Ph) is shown in FIG.
As shown in FIG. 5, when the operation mode changeover switch COP09 is set to Ph in step # 101, step # 10
In 2, the camera microcomputer C01 sets each operation switch to the silver halide shooting mode (Ph),
It instructs the lens microcomputer L06 to reset the extended position of the main lens L to infinity. Thereby, the imaging processing unit C22 and the CCD driving pulse generation unit C2
3. The image processing unit C24 and the EVF unit C27 operate, and the imaging processing unit C passes through the main lens L and the relay lens C14.
The subject image formed on 22 is displayed on the EVF section C27.

When it is recognized in step # 103 that the photographer has half-pressed the release button COP01 (S1 ON), the focus detection unit C02 is activated in step # 104,
I go to focus on the subject. The camera microcomputer C01 that has obtained focus information from the focus detection unit C02 communicates with the lens microcomputer L06 to focus on the subject.
The focus motor L09 is operated. Step # 1
If the shooting distance is shorter than 50 cm based on the operation state detection signal of the focus motor L09 in 05, the operation is stopped at 50cm in step # 106, and a warning is issued to the EVF unit C27 or the like in step # 107.

In step # 105, the shooting distance is 50 cm.
If it is longer, the in-focus display is performed in step # 108 to notify the photographer that focus has been achieved.
9. Press release button COP01 further (S2 ON)
Then, in step # 110, film shooting is performed, and while the shooting mode is not changed in step # 111, the state in which silver halide shooting is possible continues.

As shown in FIG. 16, when the operation mode changeover switch COP09 is set to Mv in step # 201, the operation in the video movie shooting mode (Mv) is performed as shown in FIG.
At 202, the camera microcomputer C01 sets the respective operation switches to the video movie shooting mode (Mv) and sets the lens microcomputer L06.
Then, a command is issued to reset the extended position of the main lens L to infinity. In step # 203, the focus detection unit C02 is activated, and focuses on the subject. Step # 20
If the shooting distance becomes shorter than 10 cm based on the operation state detection signal of the focusing motor L09 in step 4, a warning is issued to the EVF unit C27 or the like in step # 205.

In step # 204, the photographing distance is 10 cm.
If longer, the photographer turns on recording in step # 206
When recognizing that the / OFF button COP14 is pressed,
Recording starts in step # 207, and step # 20
At 8, the focus detection unit C02 is activated, and focuses on the subject. If the shooting distance is shorter than 10 cm in step # 209, a warning is issued in step # 205 to the EVF unit C2.
7 Put it on top. When the photographer recognizes that the recording has been completed by pressing the recording ON / OFF button COP14 in step # 211, the state in which the video movie can be photographed continues without changing the photographing mode in step # 212.

As shown in FIG. 17, when the operation mode changeover switch COP09 is set to Sv in step # 301 in the still video shooting mode (Sv), as shown in FIG. In addition to the video shooting mode (Sv), the main lens L
Is reset to infinity. Step # 303
Presses the release button COP01 halfway (S1O
N), the focus detection operation is performed in step # 304, and the photographing distance is set to 10 cm in step # 305.
If it becomes shorter, a warning is issued in step # 306 by EV.
Put it out on the upper part C27.

In step # 305, the shooting distance is 10 cm.
If it is longer, the in-focus display is performed in step # 307 to notify the photographer that focus has been achieved.
Press the release button COP01 further with 8 (S2 ON)
Is taken in Step # 309, and Step # 31
While the shooting mode is not changed at 0, the state in which silver halide shooting is possible continues.

In the case of the simultaneous shooting mode (PM), there are two types of operation modes. First, when the shortest shooting distance during silver halide shooting shown in FIG. 18 is 50 cm, the operation mode changeover switch COP09 is set to PM in step # 401, and the operation switches are simultaneously set in step # 402 as in the case described above. The main lens L is extended to infinity while being set to correspond to the photographing mode (PM). In step # 403, a focus detection operation is performed.
If it becomes shorter than cm, a warning is issued in step # 405.
Place it on the VF section C27.

In step # 404, the shooting distance is 10 cm.
If it is longer, it is recognized that the photographer half-pressed the release button COP01 (S1 ON) in step # 406, and the focus detection operation is performed again in step # 407. At this time, if the shooting distance is shorter than 50 cm in step # 408, a warning is issued in step # 409 by the EVF.
The release button COP01 is set in a prohibition state in step # 410. Step #
If the photographing distance is longer than 50 cm at 408, the in-focus display is displayed to inform the photographer that focus has been achieved, and step #
Further press the release button COP01 at 412 (S2O
N), and in step # 413, film shooting is performed.

Further, at step # 414, the photographer
Upon recognizing that the N / OFF button COP14 has been pressed, recording starts at step # 415. here,
In step # 416, the photographer presses the release button COP01.
When it is recognized that has been half-pressed (S1ON), in steps # 417 to # 423, the above-described step # 407 is performed.
The film shooting operation is performed in the same manner as in # 413.

When the recording of step # 415 is continued,
In steps # 424 to # 426, step # 40
The same operations as Steps 3 to # 405 are repeated, and Step # 42
If the photographer recognizes that the recording has been completed by pressing the recording ON / OFF button COP14 in step # 428, the process proceeds to step # 428.
While the shooting mode is not changed by, the state in which shooting is possible continues.

Next, when the shortest shooting distance during silver halide shooting shown in FIG. 19 is 10 cm, in steps # 501 to # 506, each operation switch is set to the simultaneous shooting mode (PM) by setting the operation mode changeover switch COP09. Corresponding to the main lens L
After the feeding position is reset to infinity, a focus detection operation is performed. When the shooting distance is shorter than 10 cm, a warning display is performed. If the shooting distance is longer than 10 cm in steps # 507 to # 512, the release button COP01 is half-pressed (S1
ON), the focus detection operation is performed again. When the shooting distance is shorter than 50 cm, a warning is displayed. When the shooting distance is longer than 50 cm, the focus is displayed, and the photographer presses the release button. When recognizing that COP01 is further pressed (S2 ON), film shooting is executed.

In steps # 513 to # 521, the recording is started when the recording ON / OFF button COP14 is recognized as being depressed.
When it is recognized that P01 has been half-pressed (S1 ON),
In steps # 516 to # 521, the above-described step #
A film photographing operation is executed in the same manner as in steps 507 to # 512.

When the recording of step # 514 is continued,
In steps # 522 to # 524, step # 50
Steps # 525 to # 505 are repeated, and Step # 525
When the photographer recognizes that the recording has been completed by pressing the recording ON / OFF button COP14 in step # 526, the state in which the photographing is possible continues without changing the photographing mode in step # 526. Also, the shortest shooting distance in silver halide shooting may be set to 10 cm only during video recording in an intermediate form between FIGS. 18 and 19.

In the above embodiment, the single-lens type is shown. However, in the present invention, the LS (2
The present invention can also be applied to an eye type. In FIG. 20, portions having the same configuration and operation as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. F2 is a flash light emitting unit, LF is a lens for silver halide photography, and C50 is a shutter that also serves as an aperture.

C02 is an AF sensor for silver salt, which is a linear CCD in the above embodiment.
(Passive AF) or an infrared light emitting unit and a light receiving unit for active AF. Further, for simplicity, AF
Although the driving portion, the zoom portion, and the audio portion are omitted, their configurations are substantially the same as those shown in FIG. In FIG. 20, the microcomputer C for the camera is used.
The transmission line between the ND filter control unit C15 and the ND filter control unit C15 is between c and c for display reasons, and the transmission line between the camera microcomputer C01 and the relay aperture control unit C19 is between d and d for display reasons. Omitted.

[0088]

As described above, according to the present invention, since the AF control mode is switched in accordance with the set photographing mode, an appropriate AF operation for performing optimal AF control according to the photographing mode is performed. Can be obtained.

According to the second aspect, since the AF speed is switched in accordance with the photographing mode, it is possible to switch between the silver halide photographing mode requiring the fastest possible AF speed and the reproduced image. Too fast AF from the balance
The speed can cope with both of the movie shooting modes that cause inconvenience.

According to the third aspect, since one-shot AF and continuous AF are switched in accordance with the photographing mode, one-shot AF is used in silver halide photography in order to minimize out-of-focus photos. In the case of video movie shooting or simultaneous shooting mode, continuous AF is used, which focuses on the subject at all times because the main focus is on movie shooting. There is an advantage that defocusing is reduced in shooting.

In particular, when the relay optical system is used in the SLR system, or when the lens for the silver halide and the lens for the video are separately configured, the focusing accuracy (depth of field) is different from that of the silver halide. Although it differs greatly depending on the video,
Since the AF sensor is configured to be switched according to the shooting mode, it is possible to use an AF sensor dedicated to a video movie and an AF sensor dedicated to a silver halide, thereby eliminating unnecessary AF operation and saving energy.

In silver halide photography, instead of snap photography, sometimes a still image is taken while holding the camera slowly. In such a case, it is preferable to have a local focus area so that a certain portion comes into focus. In such a case, since the subject is constantly moving, it is rather complicated to have a local focus area. However, according to the fifth aspect, since the control of the AF area is switched by the AF mode, various silver halides are used. Switching the AF area in accordance with the mode at the time of shooting enables easy shooting.

In silver halide photography, even if the AF auxiliary light is used for focus detection, the auxiliary light is not affected during photography, but in video photography, the AF auxiliary light is emitted on the recording screen when the AF auxiliary light is emitted. Although the shadow of the light appears,
Since the light emission control of the AF auxiliary light is switched in the AF mode, the light emission is prohibited in the video shooting mode or the simultaneous shooting mode, so that the occurrence of shadows can be eliminated.

According to the seventh aspect, in the image photographing apparatus provided with the main optical system, the light splitter and the relay optical system, the shortest photographing distance of the main optical system is switched according to the photographing mode. For the difference between the optical performance required for silver halide photography and the optical performance required for electrophotography, an optimum shortest shooting distance can be supplied for each.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration of the optical system.

FIG. 3 is a plan view showing the appearance of the apparatus.

FIG. 4 is also a rear view.

FIG. 5 is a front view of the same.

FIG. 6 is a bottom view of the same.

FIG. 7 is a plan view showing a state where a grip portion is opened.

FIG. 8 is a rear view of the same.

9A and 9B show a state in which the EVF unit is pulled out, wherein FIG. 9A is a perspective view and FIG. 9B is a side view.

10A and 10B show a state in which the EVF unit is rotated around the camera body together with the grip, wherein FIG. 10A is a perspective view and FIG. 10B is a side view.

FIG. 11 is a perspective view showing a state in which the EVF unit is raised in the vertical direction.

FIG. 12 is an enlarged plan view showing an operation display unit.

FIG. 13 is a flowchart illustrating an AF control operation in the simultaneous shooting mode.

FIG. 14 is a diagram illustrating an example of a relationship between a shooting distance and an MTF.

FIG. 15 is a flowchart showing an operation in a silver halide shooting mode relating to a shortest shooting distance.

FIG. 16 is a flowchart showing the operation of the video movie shooting mode.

FIG. 17 is a flowchart showing the operation of the still video shooting mode.

FIG. 18 is a flowchart showing one operation of the simultaneous photographing mode.

FIG. 19 is a flowchart showing another operation of the simultaneous photographing mode.

FIG. 20 is a schematic configuration diagram showing another embodiment of the present invention.

[Explanation of symbols]

L Main lens L01 Focus operation ring L02 Focus operation ring state detector L03 Zoom operation ring L04 Zoom operation ring state detector L05 Focus detector L06 Lens microcomputer L07 Zoom motor L08 Zoom motor monitor L09 Focus motor L10 AF / MF switching button L11 Main lens aperture L12 Main lens aperture controller L13 Fixed cylinder C Camera body C01 Camera microcomputer C02 Focus detector C03 Camera shake detector C04 Pellicle mirror C05 AF auxiliary mirror C06 Shutter drive C07 Shutter C08 Film C09 Film Feed control section C10 Condenser lens C11 Reflection mirror C12 Brightness detection section C13 ND filter C14 Relay lens C15 ND filter control section C1 Optical low-pass filter C17 IR cut filter C18 Second aperture, relay aperture C19 relay aperture control section C20 hot shoe C21 CCD image sensor C22 imaging processing section C23 CCD drive pulse generation section C24 image processing section C25 recording / reproducing section C26 head section C27 EVF Unit C28 Recording medium C29 Battery C30 Communication / power supply contact C31 Audio processing unit C32 External output port C33 Speaker C34 Stereo microphone C35 Operation display unit C35A
Large liquid crystal display panel C35B Light-emitting lamp C36 Recording medium drive C40 Battery cover C41 Tripod hole COP Operation unit COP01
Release button COP02 Mode switching dial COP03
Open button COP04 Still image preview and fade button COP05 Lens exchange button COP06
Red eye reduction button COP07 Scene select mode button COP08
Film change button COP09 Operation mode changeover switch COP10 Silver halide shooting screen size changeover switch COP11 Video screen changeover switch COP12 Program button COP13
Zoom button COP14 Aperture release button COP15 Camera shake correction control ON / OFF and exposure correction button COP16 First liquid crystal unit pop-up button COP17 Flash forced flash button COP18 Message display ON / OFF button COP19 Volume / video adjustment button COP20 Second liquid crystal unit pop-up button COP21 Auto rewind button COP22 Self-timer button F Flash and light F01
Flash operation control unit

Claims (7)

[Claims] 1. A first imaging means using a silver halide photographic method,
A second imaging unit using electrophotography, a first imaging mode for operating at least the first imaging unit to capture a silver halide photograph, and a second imaging mode for operating the second imaging unit to shoot a video movie. A photographing mode setting unit capable of setting two photographing modes; and an autofocus control unit, wherein the autofocus control unit switches an autofocus control mode according to the photographing mode set by the photographing mode setting unit. An image photographing apparatus characterized by being configured as described above. 2. The image photographing apparatus according to claim 1, wherein the auto focus control means switches an auto focus speed in accordance with a photographing mode. 3. The image photographing apparatus according to claim 1, wherein the auto focus control means switches between one-shot auto focus and continuous auto focus in accordance with the photographing mode. 4. The auto-focus control means switches an auto-focus sensor according to a shooting mode.
The image photographing apparatus according to claim 1. 5. The image photographing apparatus according to claim 1, wherein the auto focus control means switches control of an auto focus area according to a photographing mode. 6. The image photographing apparatus according to claim 1, wherein the autofocus control means switches the emission control of the autofocus auxiliary light depending on a photographing mode. 7. A main optical system, a light splitter, and a relay optical system are provided in an image photographing apparatus main body, and the shortest photographing distance of the main optical system is switched according to a photographing mode. The image photographing apparatus according to claim 1.