JPH11142936A - Interchangeable photographing lens and camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart a function for visually recognizing a film exposure image to a camera system by transmitting image picking up output by means of an image picking-up means incorporated in an interchangeable photographing lens through a connecting means to a camera main body. SOLUTION: As to the interchangeable photographing lens 401, a luminous flux transmitted through a half mirror 405 advances to the camera main body and becomes one for film exposure. The luminous flux reflected by the mirror 405 is guided to the light receiving surface of an area sensor 407 being the image picking-up means. A signal processing circuit 414 performs conversion from an analog video signal outputted from the sensor 407 to a digital video signal and prescribed signal processing. The digital video signal outputted from the circuit 414 is transmitted to the camera main body through a bus 416 inside the lens and a transmitter-receiver circuit L415 by a CPUL 417. The video signal transmitted to the camera main body is displayed on an LCD monitor inside the camera.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an interchangeable photographing lens and a camera system including the interchangeable photographing lens and a single-lens reflex camera main body.
A camera system that consists of an interchangeable photographic lens equipped with an image sensor that converts the subject image into electrical signals and a single-lens reflex camera body that exposes the subject image to a silver halide film. About.

[0002]

2. Description of the Related Art Since a general silver halide camera cannot evaluate a photographed subject image until a film developing process is completed, it is determined whether or not a film image as intended by a photographer has been obtained. Cannot be evaluated at the time of shooting. In particular, in the case of a single-lens reflex camera, the image of the subject at the moment of film exposure cannot be confirmed with the viewfinder because the optical viewfinder darkens during film exposure.

In view of these points, by simultaneously exposing a subject image to a silver halide film and storing the subject image photoelectrically converted by an electronic image pickup device in a memory, a photographed image can be obtained in real time without a development process. There is known a camera that can be used for both silver halide film photography and electronic imaging that enables evaluation. An example of such a camera is disclosed in
Japanese Patent Application No. 14169 discloses film shooting by using a movable mirror interlocking with a shutter release operation, changing the direction of a subject light beam at the time of film exposure, and outputting an image signal corresponding to a subject image on the film surface by an image sensor. A single-lens reflex camera provided with an image checking function is shown.

This single-lens reflex camera allows a subject image photographed on a film to be confirmed immediately after the photographing is completed. However, a drive mechanism for a movable mirror and a large-screen image sensor equivalent to a film screen size are built into the camera body. Has been
Moreover, since the operation of the movable mirror is complicated, the enlargement and complication of the camera cannot be avoided.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned technical problem. In a camera system including an interchangeable photographing lens and a single-lens reflex camera body, a function of visually recognizing a film-exposed image is provided. It is intended to grant. Further, it is another object of the present invention to avoid an increase in the size and complexity of the camera body and to maintain portability in achieving the visual recognition function.

[0006]

According to an aspect of the present invention, there is provided an interchangeable photographing lens according to the present invention, comprising: a photographing optical system and an aperture device; and an image pickup unit that photoelectrically converts incident light. A direction in which incident light is guided to the imaging means,
The optical path dividing means for dividing the light into the direction passing through the imaging lens, the first connecting means for communicating with an external device, and the mechanism inside the taking lens are controlled.
And first control means for outputting the output of the imaging means to the outside through the connection means.

That is, the interchangeable photographing lens takes an incident light with the built-in image pickup means and outputs the output of the image pickup means to the outside through the connection means. According to a second aspect of the present invention, there is provided a camera system, comprising: a photographing optical system and an aperture device; an imaging unit that photoelectrically converts incident light; a direction for guiding the incident light to the imaging unit; An optical path dividing unit for dividing the light into a passing direction, a first connecting unit for performing communication with an external device, and a mechanism in a photographing lens, and the imaging unit via the first connecting unit. An interchangeable photographing lens having first control means for outputting the output of the camera to the outside, second connecting means for communicating with the photographing lens, and a subject light beam incident from the photographing lens. A single-lens reflex camera body, comprising: a film exposure unit for exposing the obtained silver halide film; and a second control unit for controlling a mechanism inside the camera main unit and communicating with the first control unit. From When the photographing lens is mounted on the camera body, the first and second connection means are connected to each other to perform communication by the first and second control means, Based on the video signal from the means,
A storage means for storing a subject image at the time of silver halide film exposure and a visualizing means for visualizing the stored subject image are further provided in at least one of the taking lens and the camera body.

That is, the camera system can transfer an image pickup output by an image pickup means built in the interchangeable photographing lens to the camera body via the connection means, and can provide a visualization means provided on the camera body or the photographing lens. Thus, the subject image at the time of film shooting is visualized.

In a camera system according to the present invention, the visualizing means is provided on the photographing lens side. That is, in the camera system, the interchangeable photographing lens is provided with the visualization unit, and the configuration of the camera body is simplified.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The camera system according to the present embodiment includes an interchangeable photographing lens described below and a camera body described later.

FIG. 1 is an external perspective view of an interchangeable photographing lens according to the camera system of the first embodiment. The lens barrel 101 has a manual zoom ring 1 for manual zoom operation.
02, a manual focusing ring 103 for manual focusing operation, and a battery lid 104 for loading a power supply battery are provided as shown in the figure.

FIGS. 2 and 3 are external perspective views of the camera body according to the camera system of the first embodiment. The camera body 201 includes a camera mount 202 for mounting the interchangeable photographing lens, a communication terminal 203 for performing communication with the photographing lens, and a release button 2.
04, a stowable pop-up strobe 205 (FIG. 2 shows a stowed state), a power switch 206, an optical viewfinder 301, and visualization means for visually evaluating digital video signals photographed by an electronic imaging device. An LCD (liquid crystal display) monitor 302, an electric zoom operation button 303, a cartridge lid 304 for loading a film cartridge, and a battery lid 305 for loading a battery are provided as shown in the figure. The release button 204 is connected to a two-stage push switch (not shown), and these two-stage push switches are referred to as a first release switch and a second release switch, respectively.

FIG. 4 is a block diagram showing a schematic configuration of an interchangeable photographing lens according to the camera system of the first embodiment. The interchangeable photographing lens 401 has lenses 402 and 404 which are photographing optical systems for forming a subject image, and a diaphragm device 403 for controlling the amount of light passing therethrough is provided in the optical path of the photographing optical system. ing. Behind the lens 404, a half mirror 405, which is an optical path splitting means, is provided. A light beam transmitted through the half mirror 405 advances to a camera body described later, becomes a light beam for film exposure, and a light beam reflected by the half mirror 405 is , Imaging optical system 40
6, the light is guided to a light receiving surface of an area sensor 407 serving as an imaging unit. The photographing optical system, the aperture device 403, and the area sensor 407 are connected to a zoom / focus drive circuit 408, an aperture drive circuit 409, and an area sensor drive circuit 410, respectively, and these drive circuits are connected to an intra-lens bus 416. Have been. This lens bus 41
6 includes a nonvolatile memory L411, a volatile memory 413, and a signal processing circuit 41, which will be described later, in addition to the driving circuits.
4. A transmission / reception circuit L415 as first connection means and a CPU L417 as first control means are connected.

The interchangeable photographing lens 401 has a power supply L412, and the power supply L412 supplies power for driving each circuit inside the photographing lens 401. Aperture mechanism 40
Reference numeral 3 denotes a focal length change (zooming) of the photographing lens, which is controlled by the CPU L417 via the aperture driving circuit 409.
The focus adjustment (focusing) is achieved by moving the positive lens 402 and the negative lens 404 of the photographing optical system in the optical axis direction. Zooming and focusing are performed by the zoom / focus drive circuit 4.
08 is controlled by the CPU L417. The zoom / focus drive circuit 408 has a signal processing circuit of an encoder (not shown) that generates a signal according to the movement of each lens, and the CPU L417 performs focusing based on a lens drive amount described later and these encoder outputs. Do.

The area sensor 407 is controlled by the area sensor drive circuit 410, and converts the subject image formed on the light receiving surface into an analog video signal and outputs it. The signal processing circuit 414 performs predetermined signal processing including conversion of an analog video signal output from the area sensor 407 into a digital video signal, and measurement of subject brightness based on the analog video signal.

The digital video signal output from the signal processing circuit 414 is stored in the volatile memory 413 and the nonvolatile memory L411, respectively. The digital video signal stored in these memories is transmitted by the CPU L417 to the bus 416 in the lens, The data is transmitted to the camera body 501 via the transmission / reception circuit L415.

The non-volatile memory L411 is electrically rewritable storage means. The power of the taking lens 401 is turned off, or the taking lens 401 is connected to the camera body 501.
Even if the digital video signal is removed from the memory, the digital video signal is stored.

The subject luminance data output from the signal processing circuit 414 is the same as the digital video signal described above.
The bus 416 in the lens, the transmission / reception circuit L4
15 to the camera body 501.

In place of the half mirror 405,
A prism or a beam splitter having the same function may be used. FIG. 5 is a block diagram illustrating a schematic configuration of a camera body according to the camera system of the first embodiment. A movable main mirror 502 having a half-mirror structure at the center is provided in a mirror box inside the camera body 501. A central rear portion of the main mirror 502 is used to reflect a subject light beam downward in the figure. And a sub-mirror 503 that can be folded down in conjunction with the operation of the main mirror 502. The light beam passing through the half mirror portion of the main mirror 502 and reflected by the sub-mirror 503 is guided to a pair of line sensors 505 via a separator optical system 504 for separating two images. The sub-mirror 503, the separator optical system 504, the line sensor 505, and the like constitute a focus detection device using a known phase difference method.

On the other hand, a focusing plate 506, a pentagonal roof prism 507, and an eyepiece optical system 508 are arranged on the optical path of the light beam reflected by the main mirror 502, and constitute an optical viewfinder of a single-lens reflex camera. I have.

In the camera body 501, there are provided a film drive circuit 510 for feeding the loaded film 509 by the power of a motor (not shown), and a magnetic head 511 which is in sliding contact with the magnetic recording portion of the film 509. Behind the mirror box, a focal plane shutter 512 for controlling the exposure of the film 509 is provided.

The main mirror 502 and the line sensor 5
05, a focal plane shutter 512 as a film exposure means, a magnetic head 511, and a film 509
Are connected to a mirror drive circuit 515, a line sensor drive circuit 516, a shutter drive circuit 517, a magnetic head drive circuit 523, and a film drive circuit 510, respectively, and these drive circuits are connected to a bus 518 in the camera. The camera bus 518 includes a strobe circuit 513 and a non-volatile memory M51 in addition to the drive circuits.
4. LCD monitor 519, transmitting / receiving circuit M524 as second connection means, and CPU M5 as second control means
20 are connected. The switch input 521 is an input signal from a switch linked to various manual operation members (not shown) for determining a camera operation sequence and a switch unit for detecting an operation state of a camera internal mechanism.

The camera body 501 has a power source M522,
The power supply M522 supplies electric power for driving each circuit inside the camera body 501. Line sensor 505
Is a CPU M520 via a line sensor drive circuit 516.
Is controlled by the CPU 520 and the line sensor 505
The distance between the upper pair of subject light fluxes is obtained, and a photographing lens 401 is obtained.
Is calculated to drive the lens to the in-focus position.
This lens driving amount is transferred to the photographing lens 401, and the focusing is achieved by controlling the position of the lens constituting the photographing optical system via the zoom / focus drive circuit 408 as described above.

The main mirror 502 is driven by a mirror driving circuit 515, and the focal plane shutter 512 is driven by a shutter driving circuit 517. The CPU M520 calculates an aperture value for giving an appropriate exposure amount to the film 509 and a shutter speed based on the subject luminance value transferred from the photographing lens 401 and the film sensitivity detected by a film sensitivity detection circuit (not shown).

When the aperture of the taking lens 401 is controlled, the main mirror 502 retreats above the mirror box, and the focal plane shutter 512 starts running, the film 5
09 is exposed, and when the exposure is completed, the film driving circuit 5
By means of 10, the film 509 is wound up. The magnetic head 511 is driven by a magnetic head driving circuit 523, and records information related to exposure on a magnetic recording unit of the film 509 during a film winding operation.

When it is determined that the subject brightness is lower than a predetermined value, the strobe circuit 513 generates subject illumination light during film exposure. The non-volatile memory M514 is a storage unit that stores the digital video signal transferred from the photographing lens 401. Even when the power of the camera body 501 is turned off or the photographing lens 401 is detached from the camera body 501, The above stored contents are retained. The digital video signal transferred to the camera body is displayed on an LCD monitor 519 via a bus 518 in the camera.

An LCD monitor 5 for monitoring a subject image
The reason why the optical viewfinder is provided in addition to the above is that the photographing range and the photographing magnification can be confirmed even when the power of the camera is turned off, and that the photographing is not performed while looking at the LCD monitor 519 as in the related art. It is considered that taking a picture while looking through the optical viewfinder has better holding characteristics of the camera and less influence of camera shake.

The connection between the lens-side transmission / reception circuit L415 and the camera body-side transmission / reception circuit M524 is achieved by direct contact between both electric contacts, but is not limited to this. Alternatively, a wireless connection using infrared rays or the like may be used. Further, the digital video signal is stored in the nonvolatile memory L411 built in the taking lens 401 and the nonvolatile memory M514 built in the camera body 501, respectively. The system may be configured with only the non-volatile memory M514 in the camera. That is, it is only necessary that at least one of the interchangeable photographing lens and the camera body is provided with a nonvolatile memory.

FIG. 6 shows the CPU M5 in the camera body 501.
20 is a flowchart showing a shooting routine of No. 20. When the first release switch (not shown) is turned on (step S
1), a distance measurement operation is started (step S2). If it is necessary to drive the photographing lens 401 based on the result of the distance measurement, the CPUL 41 in the photographing lens 401 is used.
7, the focus drive command (command) and the lens drive amount obtained by this distance measurement calculation are transferred (step S).
3).

The CPU M520 sends a photometry command to the CPU L417 in the taking lens 401 to obtain a subject brightness value based on the output from the area sensor 407 (step S4), and receives the photometry value sent from the CPU L417 (step S4). Step S5). Based on this luminance value and the film sensitivity detected by a film sensitivity detection circuit (not shown), the CPU
The shutter speed and the aperture value that give the proper exposure amount are calculated (step S6).

Subsequently, the CPU M 520 sends an imaging start command for taking in the video signal output from the area sensor 407 to the CPU L 417 (step S).
7). In response to the imaging start command, the CPUL 417 starts an imaging sequence described later, and sends out an image information transfer command to cause the camera body to receive a digital video signal (step S8). CPUM520
Displays the received digital video signal on the LCD monitor 519 (step S9). The shooting composition before the start of the film exposure is displayed on the LCD monitor 51.
9 can be confirmed. Then, CPUM520
Determines whether the second release switch is turned on (step S10). If not, the process returns to step S7 and repeats the processing from step S7 to step S10. If the second release switch is on (step S10), the sequence proceeds to a film exposure and electronic imaging sequence from step S11.

In the film exposure and electronic imaging sequence from step S11, the CPU M520 sets the aperture drive command and the aperture drive amount to C to stop down the aperture mechanism 403 until the aperture value calculated in step S6 is reached.
It is sent to the PUL 417 (step S11), the main mirror 502 is retracted above the mirror box by the mirror driving circuit 515 (step S12), and the focal plane shutter 512 is moved by the shutter driving circuit 517 so that the shutter speed calculated in step S6 is reached. To expose a subject image on the film 509. Simultaneously with the start of the film exposure, the CPU M520 sends an imaging command for capturing a digital video signal from the area sensor 407 to the CPU L417 (step S1).
3). The CPUL 417 responds to the imaging command by
An imaging sequence to be described later is started.

When the film exposure and the electronic imaging sequence are completed in this way, the main mirror 502 retracted during the film exposure is returned to an initial position where finder observation is possible (step S14), and the aperture is driven to the initial position (open aperture value). Then, an aperture drive command and an aperture drive amount are sent to the CPU L417 (step S15), the film drive circuit 510 is controlled to wind up the film 509 by one frame, and the magnetic head 511 magnetically records photographing information on the film. (Step S16). CPUM
520 is a CPU for transmitting an image information transfer command to receive the digital video signal obtained in the above-described imaging sequence.
L417 (step S17), and the photographing lens 40
The digital video signal received from the LCD monitor 51
9 (step S18). L displayed here
The image on the CD monitor 519 is a subject image at the time of film exposure that cannot be obtained by a single-lens reflex type optical viewfinder, and it is possible to judge on the spot whether or not the film shooting is appropriate, and the image matches the shooting intention. If not, you can immediately start over. Further, the received digital video signal is stored in the nonvolatile memory L411.
Alternatively, it is stored in the nonvolatile memory M40 (step S1).
9), and return to the main routine (not shown) (step S20).

FIG. 7 shows the CP in the interchangeable photographing lens 401.
It is a flowchart which shows the main routine of UL417. When a battery (not shown) is loaded in the photographing lens 401, the CPU L417 executes an initialization process (step S21). This initialization process includes, for example, a timer, a counter,
Registers and RAM (read / write memory)
Initialization is included. Subsequently, the CPU L417 performs a standby process (step S22), and the lens 401
Is set to the power saving mode, and the program execution is stopped. From the CPU M520 of the camera body 501 to the in-camera bus 518, the transmission / reception circuit M524,
415, when a start signal is given to the CPU L417 via the intra-lens bus 416 (step S23),
L417 returns from the power saving mode and resumes normal program processing. When program processing resumes,
The CPUL417 starts counting by the internal timer (step S24).

The CPU L417 determines whether or not a zoom drive command or a focus drive command has been generated from the CPU M520 (step S25). If it is determined that the command has been generated, the photographing optical system is driven by the zoom / focus drive circuit 408 (step S26). ), And returns to step S24.
If it is determined that the zoom drive command or the focus drive command has not been received, it is determined whether or not an aperture drive command has been generated (step S27). If it has been determined that the drive command has been generated, according to the drive amount transmitted from the CPU M520, The aperture of the aperture device 403 is controlled by the aperture drive circuit 409 (step S28). After the aperture device 403 stops at the set position, the process returns to step S24. If an aperture drive command has not been received, it is determined whether or not a photometry command has been generated (step 29). If a photometry command has been generated, the subject brightness is measured based on an analog video signal from the area sensor 407. Then, the obtained photometric value is transferred to the CPU M520 (step S3).
1) Return to step S24.

If a photometry command has not been received, it is determined whether or not an imaging command has occurred (step S32). If it is determined that an imaging command has occurred, the area sensor 40 is determined.
7 to output an analog video signal (step S3
3) The analog video signal is converted into a digital video signal by the signal processing circuit 414 (step S34), and the digital video signal is stored in the volatile memory 413 (step S35), and the process returns to step S24. If the imaging command has not been received, it is determined whether or not an image information transfer command has occurred (step S36). If the command has been received, the digital video signal obtained in the imaging sequence is transferred to the CPU M520 (step S37). It returns to S24. If an image information transfer command has not been received, it is determined whether a non-volatile memory capture command has occurred (step S3).
8) When it occurs, the digital video signal temporarily stored in the volatile memory 413 is stored in the nonvolatile memory L411 or the nonvolatile memory M514 (step S3).
9) Return to step S24.

If the non-volatile memory capture command has not been received, it is determined whether or not the timer has counted a predetermined time (step S40). If the timer has not finished counting the predetermined time, the process proceeds to step S25. The process returns to continue the timer operation, and repeats the processes from step S25. If the timer has completed counting the predetermined time, the process returns to step S22 and returns to the standby process. In this way, the CP
If no command is issued from the UM 520, the CPU
By setting L417 to the power saving mode again, the power supply L
412 can be prevented from being wasted.

FIGS. 8 and 9 show the second embodiment of the present invention, respectively.
FIG. 10 is a block diagram of an interchangeable photographing lens and a camera body in the camera system according to the embodiment. The second embodiment is characterized in that the LCD monitor 519 of the first embodiment is moved from the camera body 501 to the interchangeable photographing lens 401 side. Except for the configuration around the LCD monitor 519,
The configuration of the second embodiment is the same as that of the first embodiment. With this change, the transmission processing of the image information transfer command in steps S8 and S17 in the photographing sequence of FIG. 6 is omitted. The photographing operation of the second embodiment is basically the same as that of the first embodiment, and the description of the operation is omitted.

The above-described embodiment also includes the following technical concept. (1) An interchangeable photographing lens comprising: an optical system for guiding a subject image to both the camera body and the electronic imaging device; and an electronic imaging device having an electronic imaging device for converting the subject image into an electric signal. A single-lens reflex camera body including a monitor means for displaying a subject image based on an image signal output from the electronic imaging device, and a silver halide photographing device for exposing the subject image to a silver halide film loaded in the camera body; Camera system characterized by becoming. According to (1), a video signal captured by the photographing lens is sent to the camera body, and the single-lens reflex camera body displays this video signal, so that the subject image at the time of film exposure can be easily confirmed. (2) an optical system for guiding a subject image to both the camera body and the electronic imaging device, an electronic imaging device having an electronic imaging device for converting the subject image into an electric signal, and a camera for converting an image signal from the electronic imaging device to a camera An interchangeable photographing lens having a transmitting means for transmitting to the main body, and a single-lens reflex camera main body having a silver halide photographing device for exposing the subject image to a silver halide film loaded in the camera main body. And camera system. According to (2), the video signal captured by the photographing lens can be sent to the camera body. (3) An optical system for guiding a subject image to both the camera body and the electronic imaging device, an electronic imaging device having an electronic imaging device for converting the subject image into an electric signal, and power supply to the electronic imaging device A camera system comprising: an interchangeable photographing lens having power supply means; and a single-lens reflex camera body having a silver halide photographing device for exposing the subject image to a silver halide film loaded in the camera body. . According to (3), the power supply and the imaging device are provided inside the taking lens, and the video signal can be sent to the camera body. (4) An electronic imaging device having an electronic imaging device for converting a subject image into an electric signal, an optical system for guiding the subject image to both the camera body and the electronic imaging device, and a nonvolatile memory unit. An interchangeable photographing lens that captures the subject image with the electronic imaging device and stores an output signal thereof in the nonvolatile memory unit; and a silver halide that exposes the subject image to a silver halide film loaded in a camera body. A camera system, comprising: a camera body having a photographing device. According to (4), the nonvolatile memory and the imaging device are provided inside the taking lens, and the video signal can be stored and sent to the camera body. (5) An electronic imaging device having an electronic imaging device for converting a subject image into an electric signal, an optical system for guiding the subject image to both the camera body and the electronic imaging device, and an image signal output from the electronic imaging device Monitor means for displaying the subject image on the monitor means, an interchangeable photographing lens for displaying the subject image on the monitor means, and a silver halide photographing device for exposing the subject image to a silver halide film loaded in a camera body. A camera system comprising: a camera body; According to (5), a camera system using a photographing lens capable of displaying an image signal output from the electronic imaging device on a monitor can be obtained.

[0040]

As described above, according to the present invention, it is possible to provide an interchangeable photographing lens having a built-in image pickup device that converts a subject image into an electric signal. Further, according to the present invention, an image pickup device for converting a subject image into an electric signal is built in an interchangeable photographing lens, and a video signal generated inside the photographing lens in synchronization with a film exposure operation of a single-lens reflex camera body is By outputting and displaying the screen, it is possible to provide a camera system having a function of confirming a film exposure state with a simple configuration.

Further, according to the present invention, since the imaging device is built in the interchangeable photographing lens, the size of the camera body can be increased,
Complexity can be avoided and portability is not impaired.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an interchangeable photographing lens in a camera system according to a first embodiment.

FIG. 2 is an external perspective view of a camera body in the camera system according to the first embodiment.

FIG. 3 is an external perspective view of a camera body in the camera system according to the first embodiment.

FIG. 4 is a block diagram illustrating a schematic configuration of an interchangeable photographing lens in the camera system of the first embodiment.

FIG. 5 is a block diagram illustrating a schematic configuration of a camera body in the camera system according to the first embodiment.

FIG. 6 is a flowchart illustrating a shooting routine of a CPUM.

FIG. 7 is a flowchart showing a main routine of CPUL.

FIG. 8 is a block diagram illustrating a schematic configuration of an interchangeable photographing lens in a camera system according to a second embodiment.

FIG. 9 is a block diagram illustrating a schematic configuration of a camera body in a camera system according to a second embodiment.

[Explanation of symbols]

 401 Interchangeable photographing lens 403 Aperture mechanism 407 Area sensor 411 Non-volatile memory L 412 Power supply L 413 Volatile memory 414 Signal processing circuit 415 Transmission / reception circuit L 416 Bus in lens 417 CPUL (CPU in lens) 501 Camera body 505 Line sensor 511 Magnetic field Head 513 Strobe circuit 514 Non-volatile memory M 518 Bus in camera 519 LCD monitor 520 CPUM (CPU in camera) 522 Power supply M 524 Transmission / reception circuit M

Claims (3)

[Claims] A photographing optical system and a diaphragm device; an image pickup unit for photoelectrically converting incident light; an optical path dividing unit for dividing the incident light into a direction leading to the image pickup unit and a direction passing through the image pickup lens; First connection means for performing communication with an external device; and first control for controlling a mechanism inside the taking lens and outputting an output of the imaging means to the outside via the first connection means. And an interchangeable photographing lens. 2. An image pickup optical system and a diaphragm device, an image pickup unit for photoelectrically converting incident light, and an optical path dividing unit for dividing the incident light into a direction leading to the image pickup unit and a direction passing through the image pickup lens. A first connection unit for communicating with an external device; and a first unit for controlling a mechanism in a photographing lens and outputting an output of the imaging unit to the outside via the first connection unit.
An interchangeable photographing lens having the following control means, second connecting means for communicating with the photographing lens, and exposing the loaded silver halide film by a subject light beam incident from the photographing lens. A camera system comprising: a film exposure unit; and a camera body having a single-lens reflex structure, comprising a second control unit that controls a mechanism inside the camera body and communicates with the first control unit. When the photographing lens is mounted on the camera body, the first and second connection means are connected to each other to perform communication by the first and second control means, and to perform a communication based on a video signal from the imaging means. A storage means for storing a subject image at the time of silver halide film exposure, and a visualization means for visualizing the stored subject image, at least the photographing lens or the camera body. A camera system further provided in either one. 3. The camera system according to claim 2, wherein the visualizing means is provided on the photographing lens side.