JPH1039395A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent erroneous information from being recorded in special photographing conditions where an intermediate adapter is used between a photographic lens and a camera main body, in the case photographing information including the intrinsic data of the photographic lens can be recorded on a film. SOLUTION: Plural bits of photographing information including lens intrinsic data from the photographic lens LNS are magnetically recorded on the film by a magnetic head H and it is discriminated whether data communication with the side of the photographic lens LNS is possible or not by a microcomputer PRS. When the data communication with the side of the photographic lens LNS is impossible, all the photographing information except the intrinsic data of the photographic lens LNS are magnetically recorded on the film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of recording photographing information on a film.

[0002]

2. Description of the Related Art In recent years, a photographic film is provided with a magnetic recording section, and data and the like at the time of photographing by a camera are written in the magnetic recording section, and the information is read out in a later development or printing process. A photo system has been proposed for use.

For example, Japanese Patent Application Laid-Open No. 6-18978 discloses magnetic recording of information such as date and time of photographing, aperture value, shutter speed and the like. Also, JP-A 1-28
No. 0732 discloses an example in which information on the color temperature of the object scene is recorded and used for color tone correction at the time of printing.

[0004]

By the way, as a camera capable of recording the above-mentioned photographing information on a film, especially a single-lens reflex camera with interchangeable lenses, there are various photographing lens systems. However, as a special shooting situation, an intermediate adapter may be used between the camera body and the shooting lens for close-up shooting or magnified shooting, and an astronomical telescope or microscope may be used instead of a general shooting lens. There are also examples of using things.

[0005] On the other hand, with the advance of computerization of cameras today, in order to perform advanced automatic exposure control and automatic focusing, each interchangeable lens is provided with a memory to store unique lens information as data. I have. Normally, the camera reads out such lens information data from the interchangeable lens through serial communication or the like at the time of shooting and performs automatic exposure control and automatic focusing, but when using an intermediate adapter as described above, or using an astronomical telescope or microscope. When using it,
Such lens information data may not be obtained.

Therefore, in such a shooting situation, even if data such as the focal length of a shooting lens and an F-number or shooting aperture value are recorded as shooting data, correct data cannot be obtained and wrong information is recorded. was there.

The present invention has been made in view of the above problems, and provides a camera which does not record erroneous information even in a special photographing situation and does not confuse the user. It is intended to be.

[0008]

A camera according to the present invention comprises:
It is configured as follows.

(1) Recording means for recording a plurality of pieces of photographing information including unique data of a photographing lens on a film, discriminating means for discriminating whether data communication with the photographing lens is possible, and discriminating means And control means for controlling the recording means so as to record other photographing information of the plurality of photographing information other than the unique data of the photographing lens when it is determined that data communication with the photographing lens is impossible.

(2) In the camera of the above (1), the recording means magnetically records the photographing information on the film.

(3) In the camera of (1) or (2), the unique data of the photographing lens is data including a focal length and an F number.

(4) Recording means for recording a plurality of pieces of photographing information including unique data of the photographing lens on the film, detecting means for detecting whether or not the photographing lens is mounted, and the detecting means comprising: A control means is provided for controlling the recording means so as to record other photographing information other than the unique data of the photographing lens among the plurality of photographing information when it is detected that the photographing lens is not mounted.

(5) In the camera of the above (4), the recording means magnetically records the photographing information on the film.

(6) In the camera described in (4) or (5), the unique data of the photographing lens is data including a focal length and an F number.

[0015]

FIG. 1 is a block diagram showing an electric circuit configuration of a camera according to the present invention.

In FIG. 1, PRS is a microcomputer (control device) for controlling the camera, for example, a one-chip microcomputer having a CPU, a ROM, a RAM, an A / D (analog / digital) converter and the like inside. Be composed. This microcomputer PRS
Controls various operations of the camera in accordance with a program stored in an internal ROM.
O, SI, SCLK and communication selection signals CLCM, CS
The operation of each unit is controlled by communicating with the microcomputer (control device) LPRS in the photographing lens LNS including the peripheral circuit in the camera body and the zoom optical system using the DR and the CDDR.

The communication signal SO is a data signal output from the microcomputer PRS to each unit, the communication signal SI is a data signal input from each unit to the microcomputer PRS, and the communication signal SCLK is the signal SO and the signal S.
This is a synchronous clock signal for serially transferring I.

LCM is a lens communication buffer circuit, which supplies power to the lens power supply terminal VL when the camera is in operation, and controls the microcomputer PRS.
, The communication signals SO, SI, and SCLK are passed to the lens communication terminals DCL, DLC, and LCK, respectively.

DDR is a switch detection and display circuit, which is controlled by the microcomputer PRS using the communication signals SO, SI and SCLK when the communication selection signal CDDR is given. That is, the display content displayed on the display means DSP of the camera is changed according to the data output from the microcomputer PRS to the communication signal SO, the information of each operation switch, the data of the dial DL is transmitted to the communication signal SI as data to be sent to the microcomputer PRS. Output information etc.

SW1 and SW2 are switches which are turned on in a first stroke and switches which are turned on in a second stroke, respectively, of a release switch of the camera, and an ON signal is directly input to the microcomputer PRS. M1
Is a first motor for winding and rewinding the film, and M2 is a second motor for opening and closing the light shielding cover at the film outlet of the cartridge, and is driven by respective motor drivers MDR1 and MDR2. Motor driver MDR1, M from microcomputer PRS
The signals M1F, M1R, M2F,
M2R is a signal for motor control.

MG1 and MG2 are magnets for running the front curtain and rear curtain of the shutter, respectively, and are controlled to be energized by the respective driving transistors TR1 and TR2. The microcomputer P is connected to the transistors TR1 and TR2.
Control signals SMG1 and SMG2 are provided from RS, respectively.

An SPC is a photometric sensor for measuring the amount of light of the subject that has passed through the taking lens LNS, and obtains subject brightness information by dividing the taking picture into areas S1 to S5. The signal SPCSEL is a signal supplied from the microcomputer PRS to the photometric sensor SPC to perform switching so that subject luminance information in the areas S1 to S5 is sequentially obtained as the output SSPC. Its output SSPC
Is input to the microcomputer PRS and A / D converted, and is used for exposure control of the camera according to a predetermined program.

H is a magnetic head for recording a plurality of pieces of photographing information including unique data of the photographing lens LNS on a film, and R / WCK is a magnetic signal circuit for writing and reading signals to and from the magnetic head H. Yes, it constitutes a recording means together with the magnetic head H. The microcomputer PRS outputs a signal WR when writing a signal to the magnetic head H, and inputs a signal RD when reading a signal from the magnetic head H, A / D converts the signal RD and converts it into data.

The RTC is a clock circuit for automatically clocking data information such as year / month / day / hour / minute. The microcomputer PRS reads the signal SDATE to read the year / month / day / hour / minute. Data information can be obtained.

S10 and S11 are sensors for detecting the film, S20 and S21 are sensors for reading the DD information such as the type of the film, and the output signal SS1 of each sensor.
0, SS11, SS20, and SS21 are input to the microcomputer PRS and A / D converted, and then used for controlling the camera according to a predetermined program.

LPRS is a microcomputer constituting the above-mentioned in-lens control circuit, and a signal D input to the microcomputer LPRS in synchronization with the signal LCK.
CL is data of a command from the camera body to the taking lens LNS, and the operation of the taking lens LNS in response to the command is predetermined.

The microcomputer LPRS analyzes the command in accordance with a predetermined procedure, and performs focus adjustment, zoom drive and aperture control operation, and outputs the DLC from the operation status of each part of the lens LNS (the drive status of the focus adjustment optical system and the drive of the aperture. It outputs various parameters (such as the state of the lens), various parameters (open F number, focal length, defocus amount vs. coefficient of movement of the focus adjustment optical system, etc.), and information on the lens-side operation switch LSWS.

When a focus adjustment command is sent from the camera body, the focus adjustment motor LMTR is sent to the signals LMF and L in accordance with the information on the drive amount and direction sent at the same time.
Driven by the MR to perform focus adjustment. The amount of movement of the optical system is monitored by a pulse signal SENCF of an encoder circuit ENCF that detects a pattern of a pulse plate that rotates in conjunction with the optical system with a photocoupler and outputs a pulse corresponding to the amount of movement. Measured by a counter in the LPRS, and the count value is calculated by the microcomputer LPR.
The microcomputer LPRS controls the motor LMTR by setting the signals LMF and LMR to "L" (low level) when the movement amount coincides with the movement amount sent to S.

For this reason, once the focus adjustment command is sent from the camera body, the microcomputer PRS, which is the control device of the camera, is completely involved in driving the focus detection lens until the drive of the focus detection lens is completed. No need. Also, when there is a request from the camera body,
The contents of the counter can be transmitted to the camera body.

When an iris control command is sent from the camera body, the iris driving stepping motor DMTR is driven in accordance with the information on the number of iris stages sent at the same time. Since the stepping motor DMTR can perform open control, it does not require an encoder for monitoring the operation.

Signal SEN from encoder circuit ENCZ
The CZ is configured to be output when the zoom lens is manually moved, and the microcomputer LPR
The lens parameters at each zoom position stored in S are transmitted to the camera body when the microcomputer PRS of the camera body requests the parameter corresponding to the current zoom position.

SDR is a focus detection line sensor device SN
This is a drive circuit of S, which is selected when the signal CSDR is "H" (high level) and is controlled by the microcomputer PRS using the signals SO, SI, and SCLK.

The signals .PHI.SEL0 and .PHI.SEL1 given from the drive circuit SDR to the sensor device SNS are the signals SEL0 and SEL1 from the microcomputer PRS, and .PHI.
When SEL0 = “L” and ΦSEL1 = “L”, the sensor row pair SNS-1 (SNS-1a, SNS-1b) is
When EL0 = “L” and ΦSEL1 = “H”, the sensor row pair SNS-2 (SNS-2a, SNS-2b) is
When L0 = “H”, ΦSEL1 = “H”, the sensor row pair S
NS-3 (SNS-3a, SNS-3b) is replaced by ΦSEL
0 = “H”, ΦSEL1 = “L”, sensor row pair SN
S-4 (SNS-4a, SNS-4b).

After completion of the accumulation, the signals SEL0 and SE
By appropriately setting L1 and sending clocks ΦSH, ΦHRS, SEL0, SEL1 (ΦSEL0, ΦS
The image signal of the sensor row pair selected in EL1) is output VOU.
It is serially output as T.

VP1, VP2, VP3, and VP4 are each a sensor row pair SNS-1 (SNS-1a, SNS-1
b), SNS-2 (SNS-2a, SNS-2b), S
NS-3 (SNS-3a, SNS-3b), SNS-4
A monitor signal from a sensor (not shown) for monitoring the luminance of a subject arranged near (SNS-4a, SNS-4b) increases the voltage at the start of accumulation and thereby controls accumulation of each sensor row. .

The signals ΦRES and ΦVRS are output from the sensor device SN.
S reset clocks ΦHRS, ΦSH are image signal read clocks, ΦT1, ΦT2, ΦT3, ΦT
Reference numeral 4 denotes a clock for ending the accumulation of each sensor row pair.

Output VIDEO of sensor drive circuit SDR
Is an image signal obtained by calculating the difference between the image signal output VOUT from the sensor device SNS and the dark current output, and then amplifying it with a gain determined by the luminance of the subject. The dark current output is an output value of a light-shielded pixel in the sensor row, and the drive circuit SDR outputs a signal D from the microcomputer PRS.
The output is held in the capacitor by SH, and the output of the capacitor and the image signal are amplified. The output VIDEO is input to an analog input terminal of the microcomputer PRS. The microcomputer PRS converts the signal into a digital signal, and then stores the digital value sequentially at a predetermined address on the internal RAM.

Signals / TINTE1, / TINTE2, /
TINT3 and / TINT4 are the sensor row pairs SNS-1 (SNS-1a and SNS-1b) and SNS-
2 (SNS-2a, SNS-2b), SNS-3 (SN
S-3a, SNS-3b), SNS-4 (SNS-4)
a, SNS-4b) is a signal indicating that the charge is appropriate and has been stored, and the microcomputer PRS receives the signal and executes reading of an image signal.

The signal BTIME is a signal for giving a timing for determining the readout gain of the image signal amplifier in the sensor drive circuit SDR.
From the voltages of the monitor signals VP1 to VP4 at the time when the signal becomes “H”, the read gain of the corresponding sensor array pair is determined. CK1 and CK2 are the clocks ΦRES and ΦVR
A reference clock supplied from the microcomputer PRS to the sensor drive circuit SDR to generate S, ΦHRS, ΦSH.

Then, the microcomputer PRS sets the communication selection signal CSDR to "H" and sends out a predetermined "storage start command" to the sensor drive circuit SDR, whereby the storage operation of the sensor device SNS is started.

Thus, photoelectric conversion of the subject image formed on each sensor is performed by the four pairs of sensor rows, and electric charges are accumulated in the photoelectric conversion element portion of the sensor. At the same time, the signals VP1 to VP4 of the luminance monitoring sensors of the respective sensors rise, and when this voltage reaches a predetermined level, the signals / TINT1 to / TINT4 of the sensor drive circuit SDR become "L" independently.

The microcomputer PRS receives this signal and outputs a predetermined waveform as the clock CK2. The sensor drive circuit SDR generates clocks ΦSH and ΦHRS based on the clock CK2 and supplies the clocks ΦSH and ΦHRS to the sensor device SNS. The sensor device SNS outputs an image signal in accordance with the clock, and the microcomputer PRS converts the output VIDEO input to the analog input terminal to A / D by an internal A / D conversion function in synchronization with the clock CK2 output by itself.
After the D conversion, they are sequentially stored as digital signals at predetermined addresses in the RAM.

As described above, the microcomputer PRS receives the image information of the subject image formed on each sensor array pair, and thereafter performs a predetermined focus detection calculation to find out the defocus amount of the photographing lens LNC. Can be.

FIG. 2 is an exploded perspective view showing the structure of the film cartridge, the film, and the peripheral parts in the camera having the above structure.

In FIG. 2, CT is a film cartridge, K is an opening / closing member for opening and closing a light-shielding cover at the film exit of the film cartridge CT by rotating, D
D is an information display member for displaying information such as the type, sensitivity, and number of shots of the film FM in a black and white pattern, and FK is a fork for rotating the shaft of the cartridge CT to feed and rewind the film FM.

The information display member DD is a disk-shaped member similar to the technology described in, for example, Japanese Patent Application Laid-Open No. 5-313233, and is rotated by the rotation of the fork FK. The stop position of the disk also indicates the shooting state of the film FM, that is, information such as unexposed, partial exposed, or fully exposed.

S20 and S21 are sensors as information reading means constituted by, for example, a photoreflector for reading the black and white pattern while rotating the information display member DD. SW40 and SW4
Reference numeral 1 denotes a film cartridge presence / absence detection switch contact piece which is short-circuited when the film cartridge CT is loaded into the camera body, KT denotes an opening / closing drive member for driving the opening / closing member K, and SW30 and SW31 denote opening / closing of the light shielding cover. A light-shielding lid open / close detection switch contact piece for detecting
When the opening / closing drive member KT drives the opening / closing member K and the light shielding cover is in the open position, the conduction portion SW32 on the opening / closing drive member KT
And the light-shielding lid is driven to the open position.

FM is the above-mentioned film, T is a magnetic track on the film FM, and P0 to P3 are perforations for locating a photographing screen. S10 and S11 are sensors for detecting the movement and the stop position of the film FM by monitoring the perforations P0 to P3, and are constituted by, for example, a photo reflector. H is a magnetic head for reading and writing magnetic information on the magnetic track T, and PA is a pad for pressing the magnetic track T on the film FM against the magnetic head H.

M1 is the above-described first motor for winding and rewinding a film, G1 is a gear train for connecting the motor M1 to a fork FK and a film winding spool, and M2 is an opening / closing drive member. The above-mentioned second motor G2 for driving KT is a gear train for connecting the motor M2 and the opening / closing drive member KT.

FIG. 3 is a perspective view showing a schematic structure of the above-described camera focus detection device. In the figure, MSK is a field mask, which has a cross-shaped opening MSK-1 at the center and vertically long openings MSK-2 and MSK-3 at peripheral portions on both sides.

FLDL denotes a field lens, and three openings MSK-1, MSK-2, and MSK-2 of the field mask MSK.
Three parts FLDL-1 and FL corresponding to MSK-3
DL-2 and FLDL-3. DP is an aperture, and four apertures DP, one pair in the center, up, down, left, and right
-1a, DP-1b, DP-4a, and DP-4b, and one-to-two openings DP-2a and DP-2 in the left and right peripheral portions.
b and DP-3a, DP-3 are provided. This field lens FLDL has the function of forming an image of the above-mentioned pair of apertures near the exit pupil of an objective lens (not shown).

AFL has four pairs of eight lenses ALF-1.
a, AFL-1b, ALF-2a, AFL-2b, AL
F-3a, AFL-3b, ALF-4a, AFL-4b
, And are disposed behind and corresponding to the respective apertures of the stop DP. SNS is 4 to 8
Sensor rows SNS-1a, SNS-1b, SNS-2
a, SNS-2b, SNS-3a, SNS-3b, SN
The sensor is composed of S-4a and SNS-4b, and is arranged to receive the image corresponding to each secondary imaging lens AFL.

In the focus detection system shown in FIG. 3, when the focus of the photographing lens LNS is located ahead of the film surface, the subject images formed on each sensor row are close to each other, and the focus is located backward. In some cases, the subject images are separated from each other. Since the relative positional displacement amount of the subject image has a specific functional relationship with the defocus amount of the photographing lens LNS, an appropriate operation is performed on the sensor output by each sensor row pair to obtain the focal point of the photographing lens LNS. An out-of-focus amount, that is, a so-called defocus amount can be detected.

By adopting such a configuration, even in the vicinity of the center of the range photographed or observed by the objective lens (photographing lens LNS), even an object whose light quantity distribution changes in one direction, up and down or left and right, can be used. It is possible to measure the distance, and the opening MSK around the field mask other than the center
The distance can be measured for an object located at a position corresponding to -2 and MSK-3.

FIG. 4 is a sectional view showing an optical arrangement when the focus detection system shown in FIG. 3 is housed in the camera body. In the figure, LNS is a photographing lens, QRM is a quick return mirror, FSCRN is a focusing plate, DSP is a display such as a transmissive liquid crystal display, PP is a pentaprism, FPLN is a film surface, and H is a magnetic head.
The focus detection system shown in FIG. 3 is arranged below the camera body.

SM is a submirror, MSK is a field mask,
ICF is an infrared cut filter, FLDL is a field lens, RM1 and RM2 are first and second reflection mirrors respectively, SHMSK is a light shielding mask, DP is an aperture, AFL is a secondary imaging lens, AFM is a reflection mirror, and SNS is SNS. A sensor, EPL is an eyepiece, and SPC is a photometric sensor for controlling the exposure of the camera.

Next, the operation of the microcomputer PRS according to one embodiment will be described with reference to the flowcharts of FIGS.

When the battery is loaded in the camera and the power switch is turned on, the microcomputer PRS starts the operation from step S1 in FIG.

(Step S1) Microcomputer P
The RS performs an initial setting of a memory and a port.

(Step S2) Communication with the switch detection and display circuit DDR is performed to check the state of the cartridge presence / absence detection switches SW40 and SW41. If it is off (OFF), the cartridge is absent, that is, the film cartridge CT is not inserted in the camera, so that it waits for the film cartridge CT to be inserted. When the film cartridge CT is inserted into the camera and SW40 and SW41 are turned on (ON), the process proceeds to step S3.

(Step S3) Communication with the switch detection and display circuit DDR is performed to check the state of the switch SW20 for detecting the opening and closing of the lid of the film cartridge storage chamber (not shown). If it is off, the lid of the film cartridge storage chamber is still open, so wait for it to be closed. When the lid of the film cartridge storage chamber is closed and SW20 is turned on, step S4 is performed.
Proceed to.

(Step S4) Motor driver MDR2
To start the driving of the second motor M2.

(Step S5) Communication with the switch detection and display circuit DDR is performed, and the light-shielding cover open / close detection switch SW3
0, SW31, and SW32 are input, and the process waits for detection of the ON state of the switches SW30, SW31, and SW32 indicating that the light-shielding lid has been opened.

(Step S6) Switches SW30, SW
When the on state of the switch 31, SW32 is detected, a control signal is output to the motor driver MDR2 to stop driving the second motor M2.

(Step S7) Motor driver MDR1
, And the driving of the first motor M1 is started. Thereby, the rotation of the information display member DD is started.

(Step S8) Information on the sensitivity of the film FM and the number of shots recorded on the information display member DD is input.

(Step S9) Motor driver MDR1
And the driving of the first motor M1 is stopped.

(Step S10) Next, the first motor M1
The mechanism (not shown) is switched so that the film FM can be loaded by the drive.

(Step S11) Motor driver MDR
1 to start driving the first motor M1. Thus, loading of the film FM is started.

(Step S12) Sensors S10 and S11
Is monitored and the film FM is fed to the position of the first photographing frame. When it is detected that the frame has been sent to the position of the first photographing frame, the process proceeds to step S13.

(Step S13) Motor driver MDR
1 to output a control signal to stop driving the first motor M1. This completes the loading of the film FM.
Next, the process proceeds to step S14 in FIG.

(Step S14) It is checked whether the first stroke switch SW1 of the release switch is turned on. If it is off, the process proceeds to step S15.

(Step S15) Communication with the switch detection and display circuit DDR is performed, and it is checked whether the ISO data change mode setting switch (not shown) indicating the film sensitivity is turned on. If the ISO data change mode setting switch is off, the process returns to step S14, but if it is on, the process proceeds to step S16.

(Step S16) Communication with the switch detection and display circuit DDR is performed, and the display unit DSP displays the current IS
Display O data.

(Step S17) Communication with the switch detection and display circuit DDR is performed to check whether an input for changing ISO data (not shown) has been made. If there is no input, the process returns to step S15, but if there is an input for changing ISO data, the process proceeds to step S18.

(Step S18) The ISO data is changed according to the input for changing the ISO data.

(Step S19) The changed ISO data is transmitted to the switch detection and display circuit DDR to display the changed ISO data. Thus, the ISO data can be changed. When the operation of the switch S19 ends, the process returns to the step S15.

If it is determined in step S14 that the first stroke switch SW1 of the release switch is on, the flow advances to step S20.

(Step S20) Communication with the switch detection and display circuit DDR is performed, and it is checked whether the panorama photography switching switch SWP is turned on. If it is off, the process proceeds to step S21.

(Step S21) Communication with the switch detection and display circuit DDR is performed to turn off the panorama shooting display of the display means DSP.

If the switch SWP for panoramic photographing is turned on in step S20, the process proceeds to step S20.
Proceed to 22.

(Step S22) Communication with the switch detection and display circuit DDR is performed to turn on the panorama shooting display of the display means DSP.

Then, step S21 or step S21
When the operation of Step 22 is completed, the process proceeds to Step S23a.

(Step S23a) Communication with the lens LNS is performed through the lens communication buffer circuit LCM. Then, when the data communication with the microcomputer LPRS is normally performed and the lens information necessary for the focus detection and the like is obtained, the process proceeds to step S24.

(Step S24) The control signal is supplied to the drive circuit SDR to control the accumulation of the focus detection line sensor device SNS, and the focus detection is performed by obtaining the image signal and processing the image signal.

(Step S25) The lens driving amount is calculated from the focus detection result, and the calculated driving amount is calculated.
The signal is transmitted to the in-lens control circuit LPRS through the CM to drive the lens. This brings the lens LNS into a focused state.

If the data communication cannot be normally performed with the in-lens control circuit LPRS in step S23,
Since the case where the lens LNS is not properly mounted or the case where an intermediate adapter is used for close-up shooting or enlarged shooting is considered, it is considered that autofocus cannot be performed, and the above steps S24 and S25 are not performed. The process proceeds to step S26.

(Step S26) Communication with the switch detection and display circuit DDR is performed to detect the state of a shooting mode selection switch (not shown). If the shooting mode is the automatic exposure mode, the process proceeds to step S27.

(Step S27) The microcomputer PRS obtains subject brightness information by reading the output of the photometric sensor SPC. At this time, as described above, the photometric sensor S
The PC is divided into areas S1 to S5, and it is also possible to correct the subject brightness information by detecting a light state such as forward light / backlight from the distribution of the subject brightness information in each area.

(Step S28) The optimal shutter speed and aperture value are determined based on the subject luminance information obtained in step S27.

If the shooting mode is not the automatic exposure mode but the manual exposure mode in step S26, the flow advances to step S29.

(Step S29) Communication with the switch detection and display circuit DDR is performed, and the set values of the shutter speed and the aperture value are input from a shutter speed and aperture value setting means (not shown).

Then, step S28 or step S28
When the operation of step 29 ends, the process proceeds to step S30.

(Step S30) It is checked whether the second stroke switch SW2 of the release switch is turned on. If it is off, step S14
And the above flow is repeated. If switch SW
If 2 is turned on, the process proceeds to step S31 in FIG.

(Step S31) Motor driver MDR
1 to drive the first motor M1 to perform mirror up.

(Step S32) The lens microcomputer LP through the lens communication buffer circuit LCM
The data of the aperture value obtained in step S28 or step S29 is transmitted to the RS, and the RS is narrowed down.

Thereafter, control signals SMG1 and SMG2 are output in accordance with the shutter speed data obtained in step S28 or step S29 to cause the shutter to run. When the travel of the shutter is completed, the microcomputer LPRS on the lens side is instructed to open the aperture through the lens communication buffer circuit LCM. This completes the exposure operation.

(Step S33) Motor driver MDR
1 to drive the first motor M1 to perform mirror down.

(Step S34) Motor driver MDR
1 to drive the first motor M1 to start winding the film FM.

(Step S35a) In step S23, it is checked whether data communication with the microcomputer LPRS on the lens side has been normally performed. If,
If the data communication has been normally performed with the microcomputer LPRS on the lens side, the process proceeds to step S36.

(Step S36) Magnetic signal circuit R / WC
A signal is output to K to magnetically record photographing data on the film FM. Here, all data including lens information data is magnetically recorded.

Here, all the data magnetically recorded on the film include, for example, nine types of data shown in Table 1.

[0103]

[Table 1]

The data is shooting date (date and time) information. Immediately before magnetic recording, information is input from a clock circuit RTC to magnetically record date information such as year, month, day, hour, and minute.

The data is photographing screen information, and the panoramic photographing switch S detected at step S20 is used.
The information on the standard or panoramic screen is magnetically recorded according to the state of the WP.

The data is information indicating the light state of forward light / backlight. If the subject luminance information is subjected to a predetermined backlight correction in step S27, the information representing the backlight is magnetically recorded. Is magnetically recorded with information indicating normal light. When step S29 is executed without executing step S27, information indicating the unknown is magnetically recorded because the forward light / backlight is unknown. That is, if the backlight correction value at the time of AE photographing is equal to or more than a predetermined value, the backlight is recorded, and if not, the normal light is recorded.

The data is information indicating whether or not the automatic exposure control is within the interlocking range. If the shutter speed and the aperture value determined in step S28 provide an appropriate exposure, the data indicating the within the interlocking range is converted to magnetic data. If the shutter speed and the aperture value have reached the limit values and the exposure has not been performed properly, the data indicating the outside of the interlocking range is magnetically recorded. If step S29 is executed without executing step S28, the inside and outside of the interlocking range are unknown, so that information indicating unknown is magnetically recorded.

The data is film sensitivity information set at the time of photographing. If the information input in step S8 is used as it is, the sensitivity information is magnetically recorded, and changed and set in steps S15 to S19. If the sensitivity information is changed, the sensitivity information after the change is magnetically recorded.

The data is shutter speed information at the time of photographing, and the data of the shutter speed obtained in step S28 or S29 is magnetically recorded.

The data is the aperture value information at the time of photographing, and the aperture value data obtained in step S28 or step S29 is magnetically recorded.

The data is focal length information of the photographing lens LNS attached at the time of photographing, and magnetic recording is performed using the lens information obtained in step S23.

The data is the open F number information of the photographing lens LNS attached at the time of photographing, and magnetic recording is performed based on the lens information obtained in step S23.

When the magnetic recording of the data is completed, the process proceeds to step S38. Note that the above step S35
If the data communication has not been normally performed with the microcomputer LPRS on the lens side, the process proceeds to step S37.

(Step S37) As in step S36, a signal is output to the magnetic signal circuit R / WCK to magnetically record the photographing data on the film FM. Here, from the above-mentioned data which does not include lens information data to data. Is magnetically recorded. When the magnetic recording ends, the process proceeds to step S38.

(Step S38) Sensors S10 and S11
And waits for the film FM to be sent to the position of the next photographing frame. When it is detected that the next frame has been sent, the process proceeds to step S39.

(Step S39) Motor driver MDR
1 to output a control signal to stop the driving of the first motor M1 and terminate the winding of the film FM. Thereafter, the process returns to step S14 in FIG.

As described above, the microcomputer (determining means) PRS of the camera body determines whether or not data communication with the photographing lens LNS is possible. If it is determined that data communication is not possible, data other than the unique data of the photographing lens LNS is determined. Since all (or part of) other photographing information is recorded on the film FM, even in the special photographing situation as described above, it is possible to avoid confusion for the user without erroneous information recording. Absent.

In this embodiment, data other than the lens-specific data is recorded. However, a communication disable signal indicating that data communication with the lens is impossible is recorded, and this signal is displayed during reproduction. And so on.

Next, another embodiment of the present invention will be described with reference to the flow charts of FIGS. 5, 8 and 9. FIG. 6,
The same step numbers as those in FIG. 7 indicate the same processing contents.

In the above-mentioned embodiment, whether the communication with the lens side is normally performed is determined based on whether the photographing condition using the general photographing lens from which the lens information data can be obtained or the special photographing condition not using the general photographing lens. Is determined by However, it is also effective to provide a switch in the camera body that turns on when a general photographing lens is attached and does not turn on in a special photographing situation, and discriminates between them.

FIGS. 8 and 9 are operation flowcharts under the control of the microcomputer PRS in such a case. A switch signal that turns on when a general photographing lens is attached and does not turn on in a special photographing situation is given. FIG.
, The circuit configuration is the same as that of FIG. The layout around the film in FIG. 2 and the optical layout in FIGS. 3 and 4 are the same as those in the above-described embodiment.

When the processing in step S13 of the flowchart in FIG. 5 ends, the process proceeds to step S14 in FIG. The difference between the flowcharts of FIG. 8 and FIG.
Only steps. Therefore, the description of the other steps is omitted since it is the same as that of the first embodiment, and only step S23 is described.

(Step S23b) Communication with the switch detection and display circuit DDR is performed, and the lens attachment detection switch S
Check ON / OFF of WLENS. If ON of the switch SWLENS is detected, it is regarded that the focus can be detected, and necessary lens information is stored in the lens communication buffer circuit L.
Microcomputer LPRS on lens side through CM
And the process proceeds to step S24. Switch SWLE
If NS is off, it is considered that focus detection cannot be performed, and step S2 is performed without executing steps S24 and S25.
Proceed to 6.

Proceeding to the subsequent steps, step S in FIG.
If it is detected at 30 that the second stroke switch SW2 of the release switch is turned on, the process proceeds to step S31 in FIG. The only difference between the flowcharts of FIGS. 9 and 7 is the step of S35. Therefore, the description of the other steps is omitted since it is the same as that of the first embodiment.
Only the step of S35 will be described.

(Step S35b) It is checked whether or not the switch SWLENS has been turned on in step S23b of FIG. If switch SWL
If ON of ENS has been detected, the process proceeds to step S36 in order to magnetically record all data including lens information data. If the switch SWLENS has been turned off, the process proceeds to step S37 to magnetically record data including no lens information data.

As described above, whether or not the photographing lens LNS is mounted is detected by the detecting means including the switch SWLENS, and if it is detected that the photographing lens LNS is not mounted, photographing information other than the unique data of the photographing lens LNS is transmitted. Since all of the information is recorded on the film FM, erroneous information recording is not performed even in a special photographing situation as in the above-described embodiment, and the user is not confused.

[0127]

As described above, according to the present invention,
A recording unit capable of recording a plurality of pieces of photographing information including unique data of the photographing lens on the film; a data communication availability determining unit with the photographing lens; By having the control means for controlling the recording means so as to record other information than the unique data of the lens in the photographing information, erroneous information recording in a special photographing situation causes confusion to the user. Has the effect of being able to eliminate such a situation.

According to the present invention, a recording means capable of recording a plurality of pieces of photographing information including unique data of a photographing lens on a film, a photographing lens mounting detecting means, and the detecting means cannot detect the photographing lens mounting. In such a case, by having the control means for controlling the recording means so as to record other information than the unique data of the lens among the plurality of pieces of photographing information, erroneous information in a special photographing situation as above There is an effect that it is possible to prevent the user from being confused by recording.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electric circuit configuration of a camera according to the present invention.

FIG. 2 is a perspective view showing a configuration of a film cartridge and its periphery.

FIG. 3 is a perspective view showing a configuration of a focus detection device.

FIG. 4 is an explanatory diagram showing an arrangement position of an optical system.

FIG. 5 is a flowchart showing the operation of one embodiment.

FIG. 6 is a flowchart showing the operation of one embodiment.

FIG. 7 is a flowchart showing the operation of one embodiment.

FIG. 8 is a flowchart showing the operation of another embodiment.

FIG. 9 is a flowchart showing the operation of another embodiment.

[Explanation of symbols]

 LNS photographing lens PRS microcomputer (control means, discriminating means) LPRS microcomputer H magnetic head (recording means) R / WCK magnetic signal circuit (recording means) SWLENS switch (detecting means) FM film

Claims (6)

[Claims] A recording means for recording a plurality of pieces of photographing information including unique data of a photographing lens on a film; a discriminating means for discriminating whether data communication with the photographing lens is possible; A control unit configured to control the recording unit so as to record, other than the unique data of the photographing lens, the photographing information of the plurality of photographing information when it is determined that data communication with the photographing lens is impossible. And the camera. 2. The camera according to claim 1, wherein said recording means magnetically records the photographing information on a film. 3. The specific data of the photographing lens includes a focal length and F
2. The data including a number.
Or the camera of 2. 4. A recording means for recording a plurality of pieces of photographing information including unique data of a photographing lens on a film; a detecting means for detecting whether or not the photographing lens is mounted; A camera, comprising: control means for controlling the recording means so as to record, other than the unique data of the photographing lens, the photographing information of the plurality of photographing information when it is detected that the photographing information has not been obtained. 5. The camera according to claim 4, wherein the recording means magnetically records the photographing information on a film. 6. The photographing lens specific data includes a focal length and an F value.
5. The data including a number.
Or the camera of 5.