JPS62119532A - Camera capable of setting trimming mode - Google Patents

Abstract

PURPOSE:To inhibit a trimming mode photographing in response to a positive film load signal by providing a photographic mode selecting means, which selects not only photographic modes but also the trimming mode, and a film classification discriminating means. CONSTITUTION:It is discriminated whether the flash mode is set or not if the photographic mode is not the normal mode, and it is discriminated whether a negative film flag NFF is set or not if the flash mode is set. If the flag NFF is set, that is, a negative film is loaded or no films are loaded or a film having no CAS code is loafed, the trimming mode can be set; and the trimming mode is set, and a trimming mode index is turned on, and a flash mode index displayed till then is turned off. If the flag NFF is not set, that is, a positive film is loaded, the trimming mode cannot be set, and therefore, the normal mode is set. Thus, photographing in the trimming mode is inhibited when a positive film is used for photographing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera in which a trimming mode can be set.

[Conventional technology]

Deciding on the composition is important when taking a photo, and for this purpose, you can decide at the time of shooting, change the distance to the subject, or
There are two methods: one is to shoot using an interchangeable lens or a zoom lens, and the other is to examine the film after shooting and then trim the film.

One of the methods using cropping is to equip the camera with a finder optical system that can change the field of view and size, and use this finder optical system to select the screen range to be photographed, as well as to display cropping information in conjunction with the viewfinder optical system. is recorded on the film, and when printing, a part of the photographed screen is printed at a different enlargement magnification than usual based on this trimming information, so that it has a focal length longer than the focal length of the lens attached to the camera. A camera has been proposed that can produce prints that look like those taken with a telephoto lens (see Japanese Patent Laid-Open No. 54-2672i).

[Problem that the invention seeks to solve]

With the cameras described above, the size of the subject in the image is the same whether the image is taken in normal shooting mode or in cropping mode; Because the images are printed using a telephoto lens, the effect is as if the image was taken with a telephoto lens, so it is essential to use negative film.

Therefore, in the case of visual film that is rarely printed and almost never printed at the same time as development, it is not only meaningless to shoot in trimming mode, but also when the visual film is loaded. If you change the size of the field of view frame to shoot in cropping mode, problems may occur such as the composition seen in the viewfinder and the composition actually taken. In this case, there is a problem that if the mark indicating the trimming mode is placed on the film surface within the trimming screen, it becomes an eyesore.

[Failure to solve the problem]

In order to solve the above-mentioned problems, this invention prohibits shooting in trimming mode when the loaded film is a visual film, and the shooting modes include normal shooting mode and trimming mode. a photographing mode selection means for selecting a photographing mode, a film type determining means for determining whether the loaded film is a negative film or a positive film, and prohibiting trimming mode photographing in response to a positive film loading signal from the film type determining means. It consists of the means to do so.

[For production]

With the above configuration, the type of negative or positive film to be used is determined, and based on the signal of the determination result and the trimming mode signal of the shooting mode selection signal, it is possible to determine whether the film is loaded and shooting in trimming mode. Detects when an attempt is made and prohibits photography.

〔Example〕

Next, an embodiment of the camera of the present invention will be described.

In this embodiment, when the film used is negative film, three shooting modes can be selected: normal mode, flash mode, and trimming mode, and when the film used is positive film, the shooting modes are normal mode and flash mode. There are two modes to choose from.

FIG. 1 is a perspective view showing the appearance of the embodiment.

1 is the camera body, 2 is the photographing lens, 3 is the flash emitter, 5 is the light receiving part of the automatic exposure control mechanism, 6 is the finder window, 7 is the finder lighting window, 8.9 is the distance measurement window of the automatic focus detection mechanism, Reference numeral 11 indicates a shutter button, 15 indicates a photographing mode selection button, and 16 indicates a liquid crystal display panel on which various information relating to photographing, which will be explained later, is displayed.

Figures 2 and 3 are front views of the liquid crystal display, Figure 2 shows the case when negative film is loaded, and Figure 3 shows the X1
Shows when Sojifilm is loaded.

As is clear from FIG. 3, when a visual film is loaded, there is no trimming mode, and there are two choices: normal mode and flash mode.

To explain the display section, 16 is a liquid crystal display panel, 20 is a normal mode, 21 is a display section showing a flash mode, and 22 is a display section showing a trimming mode. When each mode is selected, the upper triangular display 20a, 2 ], a
The color tone of 122a is displayed in different colors. 23 is a display section showing film loading, 24 is a film sensitivity display section, 25
．． Reference numeral 26 indicates a display indicating rewinding of the film and the completion of rewinding (flashing), and reference numeral 27 indicates a display section for the number of shots.

Each time you press the shooting mode selection button 15, when loading negative film, the cycle changes repeatedly as normal mode → flash mode → trimming mode → normal mode, and when using positive film, the cycle changes repeatedly as normal mode → flash mode → normal mode. Change.

Next, the camera system will be explained. FIG. 4 shows a circuit diagram of the camera system.

Electric power supplied from the power supply battery BA is supplied to the microprocessor MPU and others. Automatic exposure control mechanism AE, automatic focus adjustment mechanism AF, flashmatic timer FM
Power is supplied to the T and others from a power transistor BT operated by a signal sent from the output PWC of the microprocessor MPU.

Sl is a photometry switch, which is closed by pressing the release button 11 to the first step. S2 is a release switch,
It is closed by pressing the release button 11 to the second step. EXS is not a switch that is operated from the outside, but is an exposure completion switch that turns OFF when exposure control is completed and the ON1 control mechanism is charged. The IFS is a one-frame winding switch that turns ON when the film has been wound one frame and turns OFF during winding.
For example, when all the frames of the film have been photographed and the end of the film is reached, turn it on, and then rewind the film to turn it off.
This is an overload detection switch. The output side of these switches is the MPU input port ■NTo1Po1P3,
P20MP21 are connected to each other.

BO2 is a back cover switch that turns on when the camera back cover is opened and turns off when it is closed, and its output is connected to the input heat P2□ of the MPU, and information regarding opening and closing of the camera back cover is stored in the MPU. In order to reset the information each time the camera back is opened or closed, a pulse is sent from the noggle generator PG4 and sent to the input port lNT of the MPU via an AND gate.
1 and performs interrupt processing.

KS is a key switch that is turned ON when the shooting mode selection button is pressed, and its output is connected to the input port P18 of the MPU, and also sends out pulses from the one-shot pulse generator O8, and passes through the AND gate to the MPU. Every time input is made to the input port NT1 and the shooting mode is switched, information processing regarding the shooting mode in the MPU is performed.
Let's handle the interrupt.

This is the film winding control section, and the output port P4 of the MPU
The film winding morph MO is driven in response to a winding command signal WSTA from the film winding morph MO. Further, when the overload detection switch RWS is turned on, the film is rewound in response to the rewinding command signal PWSTA from the MPU output port P2O.

FL is a flash emitter control unit, and charging of the flash emitter is started in response to a charging start command signal CH3TA from the output port P6 of the MPU. In order to check the state of charge, a detector activation signal DET is sent from the output terminal P7 of the MPU, and the state of charge is checked. When charging is completed, a charging completion signal CHC is sent to the input heat P8 of the MPU, and in response, a charging completion signal is sent from the output N-to p9 of the MPU to light up the charging completion display element CHD.

Furthermore, in order to prevent the release of the light emitting device before it is fully charged during flash photography, the release is locked in the MI)U before charging is completed, and the MPU's output port P□ is also locked. A release lock warning signal is sent out from the controller, and the release lock warning display element RLW is turned on.

CAD is a part that reads a CAS code that electrically displays the permissible error range for film sensitivity and exposure, which is provided on the outside of the cutrone containing the film. Upper 2
The switch ERD is a code reading unit that indicates the exposure tolerance range. Since positive film is given a tolerance range of ±1/2, the read signal is ±1/2.
If it is 2, it can be determined that a positive film has been loaded; otherwise, it can be determined that a negative film has been loaded.

In addition, the lower five switches ISD are the reading parts for the code indicating film sensitivity, and when the CAS code is read, it is 5
One of the switches is always turned on. This allows you to determine the presence or absence of a CAS code.

The outputs of the above two switches ERD and ISD are input to the input state P23 of the MPU. Still, the film sensitivity signal read by the switch ISD is sent to the automatic exposure control mechanism AE, IJ marking mark imprinting section via the flashmatic timer and digital-to-analog converter DA, and is adjusted according to the film sensitivity rO- Used to determine exposure amount.

The LCD is a liquid crystal display section, and various display signals as previously explained with reference to FIGS. 2 and 3 are outputted from the output capacitor (P2/) of the MPU.

FDS is a film detection switch that turns OFF when film is loaded and turns ON when unloaded. While the film is still being rewound, turning on will stop the rewinding. Its output is M
PU input N-) P engineering. is input.

When the power is turned on and the power transistor BT is turned on, the automatic exposure control mechanism AE is activated and photometry of the field is performed. When the AE lock signal AEL is output from the output port P13 of the MPU, the exposure value EV obtained from the photometric value and film sensitivity at that time is fixed. This is called AE lock.

What about the film sensitivity information mentioned above? Automatically read the DX code on the Torone or manually set the film sensitivity setting switch FS, and send the output signal to the D/A converter DA.
In addition to supplying the signal as an analog signal to the automatic exposure control mechanism AE, the signal is also supplied to the flashmatic timer FMT, which will be explained later.

When the automatic exposure control mechanism AE determines as a result of exposure calculation that the field is dark and the shutter speed exceeds the low speed limit, it sends a low speed limit signal SS to the input port P□4 of the MPU. In response to this, the MPU outputs a low speed limit warning display signal from the PI3, and the warning display element UNW lights up.

On the other hand, when the power is turned on and the power transistor BT is turned on, the automatic focus adjustment mechanism AF also starts operating, the distance to the subject is measured, and the distance data is memorized. Sent to FMr.

When a release signal is sent from the output port P1□ of the MPU, the release circuit REL is activated, the lens is unlatched, the lens starts moving, and the amount of movement is measured. When the distance data matches the previously stored distance data, the driving magnet AFM is demagnetized and the lens stops.

Returning to the automatic exposure control mechanism AE again, a release signal is sent from the MPU's output terminal P11, and when the automatic focus detection mechanism AF completes its operation, the shutter begins to open due to mechanical interlocking and the count switch C8 is turned on. become.

The shutter is a triangular wave shutter that also serves as an aperture. Pulses are sent out from an encoder linked to the movement of the shutter, and the pulses are counted. When the counting and 6 Lux values match the exposure EV value that was previously AE-locked, it is determined that the exposure is appropriate.
(Driving magnet) The AEM is demagnetized and the shutter is closed.

When the subject is dark, the shutter speed is slowed down, but when the exposure value EV as a result of metering the subject falls below the value EVC, which is the combination of the shutter's low speed limit and aperture value, the shutter speed is prevented from slowing down any further. No, the speed limit is in effect. For this purpose, automatic exposure control mechanism AE
When the count switch C8 is turned on, the internal timer starts operating, and after a certain period of time, the shutter drive magnet (AEM) is forcibly demagnetized. Then, a certain 13 hours after the actual shutter closing operation starts, a shutter closing signal AEC is sent to the flashmatic timer FMT, and a light emission start signal F is sent from the flashmatic timer F to the flash light emitting unit FL.
LSTA is sent out and light emission occurs.

Flashmatic timer F■゛ha, MPU output boat P construction. The operation is started in response to a signal FLE from. Flashmatic timer recess is automatic focusing mechanism AF
The light emission start timing data of the flash light emitter is calculated based on the distance data from I) ISD and the film sensitivity data from the film sensitivity setting switch FS. The flashmatic timer FMr sends a light emission start signal FLSTA to emit a flash when the time at which counting is started satisfies the light emission start timing data by the operation of a count switch C8 which is closed at the same time as the shutter starts to open. section FL, and the flash is emitted. As a result, the flash is emitted when the shutter blade is opened to a position suitable for providing the necessary amount of exposure, making it possible to provide appropriate exposure. On the other hand, if the shutter closing signal ABC is sent before the above-mentioned time satisfies the light emission start timing data, in other words, as explained in the section of the automatic exposure control mechanism section, due to the low speed limit of the shutter, the shutter closing signal ABC is sent. When the shutter begins to close, a shutter close signal AEC is sent. In this case, the shutter close signal AEC sends a light emission start signal FLSTA to the flash light emitting section FL to cause the flash to emit light.

When the trimming mode is selected at the time of photographing, a trimming mode signal is sent from the output port P15 of the MPU, and a field frame display TRD indicating the trimming area is displayed in the finder. This display can use a liquid crystal or the like.

Further, trimming marks are imprinted on the film during exposure control, and this is done by the imprinting circuit TRM. This circuit TRM is Pl.

When a pulse of "L" is input, the imprint operation is started and the time imprint operation corresponding to the film sensitivity from the DA converter DA is performed.

Next, signal processing performed within the microprocessor MPU will be explained.

FIG. 5 shows an interrupt process caused by pressing the shutter button and closing the photometry switch S□. When the interrupt signal is input to the terminal INTo, the operation of boosting the voltage for charging the flash light emitting unit and detecting the state of charge is stopped. This is because if the exposure control mechanism is activated by interrupt processing during boosting, there is a risk that exposure control may not be performed correctly because the power supply voltage is lowered.

Next, the power transistor BT is turned on to supply power to the automatic exposure control mechanism AE, automatic focus adjustment mechanism AF, t, etc. A
After waiting a certain amount of time for E and AF operation, the photometric value is memorized and the fart lock is performed.

Checks whether the shooting mode is normal shooting mode. If it is normal shooting mode, checks whether the subject is dark and the shutter speed is below the slow speed limit. If it is below the slow speed limit, displays an underexposure warning. After turning on, release switch S2
I'm going to check it out.

If it is not below the low speed limit, it immediately goes to check the release switch S2.

When the photographing mode is not the normal photographing mode, the charging state detector of the flash light emitting unit is turned on to check the charging state. If charging is complete, the charging state detector is turned OFF, the charging completion display is turned ON, and the user goes to check the release switch S2. If charging is not completed, set the release lock state to prevent the shirt release, turn on the release lock warning display, wait for the light metering switch S1 to turn off, and move on to the stop routine. Check the release switch S2 and turn it on. If not, check whether the photometry switch S1 is OFF, and if it is OFF, proceed to the stop routine. If S□ is not OFF, check S2 again.

If the release switch S2 is ON, a release signal is sent out and an exposure control operation is started.

Check the shooting mode, and if it is in trimming mode, output to "L" No. 3 Lus Pl2 for imprinting trimming marks,
This process is omitted when not in trimming mode. Next, check the shooting mode again, and if it is normal shooting mode, set the flashmatic timer operation command signal FLE to "H" to disable it, and if it is not normal shooting mode, set the flashmatic timer operation command signal FLE to °'L. ” activates the flashmatic timer FMr and enables the flash to fire.

Waiting for the completion of the exposure operation, the power is turned off, the charging completion display and the underexposure warning display are turned off, and the winding of one frame of film is started. If the film winding is not completed, check the overload detection switch RWS and check if there is an overload condition.
That is, when the end of the film is reached and the film cannot be wound, the rewind routine is performed. If there is no overload, wait for rewinding to complete.

When winding is completed, stop winding, check whether there is film, and if there is film, press the film counter FC.
Add 1 to R. The film counter value is compared with a predetermined value (for example, =39), and if it is a dog based on this value, the film counter FCRK KO value is entered and the contents of the film counter are displayed on the display section. Further, when there is no film, O is displayed on the display section, and when the contents of the film counter are not larger than K, the contents of the film counter are displayed on the display section.

After waiting for the photometry switch S1 to turn OFF, the process moves to a stop routine.

FIG. 6 shows the processing of the rewind routine.

1. First, stop winding, wait for the photometry switch to turn OFF, and then display a rewind message on the display. Next, rewinding is started, and the film detection switch FDS is checked to be ON1, that is, the film is out, and rewinding is stopped.The rewinding completion is displayed on the display section, and the process moves to the stop routine.

FIG. 7 shows the processing of the stop routine.

First, turn off the charging completion display, release lock warning display, and shutter low speed limit warning display, and turn off the AE lock.
FF and turn off the power supply.

After allowing interrupt processing, check the shooting mode and use the flash if it is not the normal shooting mode.
For charging, the booster and charging state detector are turned on to start charging. After waiting for the completion of charging, the detector and the booster are turned off, and in the normal photographing mode, the booster is turned off, and the process is completed.

FIG. 8 shows a routine for interrupt processing by opening/closing the camera back cover and selecting a photographing mode.

Open and close the back cover of the camera, and turn on the back cover switch BC3.
When the key switch KS is turned on by changing the photographing mode, an interrupt signal is input to the terminal INT, and interrupt processing is started.

First, the booster for charging the flash light emitting unit and the charging state detector are turned off, and the back cover opening/closing flag BCF is checked.

This flag is 1 when the camera back is closed, and 0 when the camera back is closed. Therefore, when the back cover switch BC8 is OFF (closed) and 7 lag BCF = 1, the change is from open to closed, and when the back cover switch BC3 is ON (open) and the flag BCF = 0, the change is from closed to open. indicates an interrupt.

The camera back switch BC5 is still ON and the flag BCF is 1.
, when the back cover switch BC3 is OFF and the flag BCF=0, this corresponds to an interrupt caused by switching the photographing mode.

Returning to the flowchart in FIG. 8, if flag BCF=1, check back cover switch BC8, and if ON, key
Move on to the routine. Also, if the button is BCF key 1, the camera back switch BC8 is checked, and if it is ON, the program moves to the back cover routine, and if it is ON, the program moves to the key routine.

If the back cover switch BC8 is not ON, that is, if the back cover has transitioned from an open state to a closed state, 0 is set in the flag BCF to check whether or not a film is loaded.

If it is loaded, it will wind up three frames until the first frame that can be photographed arrives. Put 0 in the preliminary hoisting counter sieve, start hoisting, wait for hoisting completion, add 1 to the counter area, and repeat until PWN-3 is reached. Counter bugi = 3
If this occurs, winding is stopped, 1 is placed in the film counter FCR, and the contents of the film counter are displayed on the display section.

After waiting for a certain period of time for the film to stabilize, the CAS code on the notorone of the DX film is read.

Check the presence or absence of CAS code CAD, and if it is present, "DX"' will be displayed on the display and the ISO of the film sensitivity read.
Display. Furthermore, it is determined whether or not the film is a negative film based on a code indicating the exposure tolerance range, and if the film is a negative film, 1 is set in the negative film flag NFF, and if not, 0 is set in NFF. After this, negative film flag N
I'm going to check out FF.

When no film is loaded or there is no CAS code, the ``°DX'' display on the display is turned OFF, and the film sensitivity is displayed as ISO100. Set 1 to film flag NFF.

Next, go to the negative film flag NFF wo adjustment, if there is 1, then 3
Seed photography mode display mark (Fig. 2 20°21.22)
Of these, crop marks are displayed. Further, when the negative film mark NFF is not 1, the trimming mark display is turned off. Next, a normal shooting mark and a flash shooting mark are displayed.

Next, set the basic normal shooting mode, and set the indicator above the normal shooting mark in the shooting mode display area L (see Figure 2).
0a) is turned on to allow interrupt processing, and then the processing ends.

FIG. 9 shows a key routine for switching the photographing mode shown in FIG.

First, check the shooting mode that was set up until then, set the flash shooting mode if it is normal mode, turn on the flash mode indicator as an indicator for shooting mode display, and set the normal shooting mode indicator that was displayed up until then. O
Make it FF.

Further, if the photographing mode is not the normal mode, it is checked whether the photographing mode is the flash mode or not, and if the photographing mode is the flash mode, it is checked whether the negative film flag NFF is 1 or not. N.F.
If F = 1, that is, if the film is a negative film, no film is loaded, or a film without a CAS code, the trimming mode can be set only at this time.Set this mode, turn on the trimming mode indicator, and then select the trimming mode that has been displayed up to that point. Turn off the flash mode index. When the negative film flag NFF is not 1, that is, if it is a visual film, the trimming mode cannot be set, so the setting is shifted to the normal mode.

Also, if the shooting mode is not in trimming mode,
Until then, the camera was in trimming mode, so the normal shooting mode is set.

Then, the normal shooting mode index is turned ON, and the flash mode index and the trimming mode index are turned OFF.

When the above processing is completed, the process returns to the stop routine.

FIG. 10 shows the back cover routine shown in FIG.

Here, the camera back cover is opened and the back cover switch BC8 is set to OFF.
Starts when N. Set 1 to the back cover open/close flag and turn off the rewind display on the display.

Next, it is checked whether film winding is complete, and if it is not completed, winding is started, and winding is stopped after winding is completed.

Next, the film counter FCR is returned to 0, and the counter content 0 is displayed on the film counter of the display section. Further, when the film winding is completed, the film winding process is omitted, the film counter FCR is returned to 0, the counter contents are displayed on the display section, and the process proceeds to the display reset routine shown in FIG.

The configuration of the embodiment has been described above, but in addition to this embodiment,
Instead of using the DX code to determine the type of film negative or positive, the camera user could set it directly using a switch, etc.

In addition, in relation to this, when the use of positive film is set as the film type using an operating member such as a lever, if the shooting mode is also switched using the lever and the trimming mode is selected with positive film, both of the above The levers could also be locked together so that they cannot be set.

Furthermore, it would be possible to lock the release and display a warning when the shooting mode is trimming mode and the film is negative. In this case, it would be possible to detect when the photometry switch is closed, immediately switch the photography mode to normal photography mode or flash photography mode, and wait for the release switch to close.

[Effects of the Invention] As explained above, according to the present invention, when taking pictures using positive film, even if an attempt is made to take pictures in trimming mode, this is prohibited and the photographer cannot use the viewfinder. This eliminates the problem of discrepancies between the observed composition and the composition actually photographed, and it also prevents marks indicating cropping mode from entering the shooting screen, which prevents unintentional errors caused by incorrect operation by the user. This will prevent you from taking photos that were not intended to be taken. □

[Brief explanation of drawings]

FIG. 1 is a perspective view of a camera according to an embodiment of the invention, FIG.
FIG. 3 is a front view of the liquid crystal display screen, FIG. 2 shows the case when a negative film is loaded, and FIG. 3 shows the case when a visual film is loaded. Fig. 4 is a camera system circuit diagram, Fig. 5 is a flowchart of an interrupt processing routine related to shooting, Fig. 6 is a flowchart of a rewind routine, Fig. 7 is a flowchart of a stop routine, and Fig. 8 is an interrupt processing by shooting mode selection. FIG. 9 shows a flowchart of the photographing mode selection routine, and FIG. 10 shows a flowchart of the back cover routine. 1: Camera body, 2° shooting lens, 3: Flash emitter, 11: Shutter button, 15: Shooting mode selection button, 16: Liquid crystal display panel = 27- Figure 1

Claims (1)

[Claims] In addition to the normal shooting mode, the shooting mode includes a trimming mode, and a shooting mode selection means for selecting these;
The present invention is characterized by comprising a film type determining means for determining whether the loaded film is a negative film or a positive film, and a means for inhibiting trimming mode photography in response to a positive film loading signal from the film type determining means. A camera with configurable cropping modes.