JPH04190337A - Camera capable of erasing improper frame number - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] A. Industrial Field of Application The present invention relates to a camera that alternately performs film frame feeding and photographing, and particularly relates to a camera in which a plurality of types of frame numbers are recorded as latent images corresponding to each frame. Regarding things that use film.

B. Conventional technology and its problems There is film in which a frame number is recorded as a latent image corresponding to each photographed frame. Conventionally, this type of frame number is recorded from the leading frame to the trailing frame of the film. They are numbered like 1,2°3...36. That is, the photographing order and frame numbers are made to match with a camera that employs a normal winding method in which the film is wound one frame at a time for each photograph.

However, some cameras use the so-called prewind method, in which the film is wound to the end when loaded, and then rewound one frame at a time into the cartridge each time a photo is taken. If a film with such markings is used, there is an inconvenience that the frame numbers and the shooting order are reversed and do not match.

Furthermore, some cameras have the film cartridge loaded on the left end side when viewed from the back, and others have it loaded on the right end side, and depending on the loading position, the loading position of the cartridge is upside down. In other words, the vertical direction of the subject image formed on the film is reversed in the above two types of cameras. However, the frame numbers on the film are only assigned to correspond to one camera, so if the film is loaded into the other camera, the vertical direction of the subject and the vertical direction of the frame number will match. There is a problem that it is difficult to see without using the camera.

SUMMARY OF THE INVENTION An object of the present invention is to provide a camera that is capable of displaying only proper frame numbers regardless of the winding method or the loading posture of the cartridge, and that is capable of erasing nonconforming numbers.

The present invention will be described with reference to FIG. 1 showing an embodiment of means for solving the C0 problem. The present invention is applied to a camera that alternately performs film frame advance and photographing. Further, an erasing means 121 is provided for exposing and erasing non-conforming frame numbers among a plurality of types of frame numbers recorded as latent images corresponding to each frame of the film, thereby solving the above problem.

The 00 effect erasing means 121 exposes and erases non-conforming frame numbers among a plurality of types of frame numbers recorded as latent images corresponding to each frame of the film. This makes it possible to display only the correct piece number regardless of the winding method or the loading position of the cartridge.

Note that in the above sections 0 and 0 which describe the present invention in detail, figures of embodiments are used in order to make the present invention easier to understand, but the present invention is not limited to the embodiments.

E. Embodiment 1 First Embodiment A first embodiment of the present invention will be described with reference to FIGS. 1 to 8.

FIG. 2 is a plan view of the film according to the present example taken out from the cartridge, viewed from the base side of the film.

1 is a film, 2 is a cartridge, and film 1 has a, b,
A frame number is recorded as a latent image at each position indicated by Q and d.

The frame numbers at positions a and C are numbered 1, 2, 3...36 from the leading edge frame to the trailing edge frame of the film 1, while the frame numbers at positions b and d is the length of film l from the end frame to the leading edge frame,
They are labeled as 2゜3...36. Further, the vertical direction of the piece numbers is reversed between the a position and the C position, and between the b position and the d position. In FIG. 2, each frame number a, b,
c and d are shown by solid lines.

A camera loaded with a cartridge 2 containing such a film 1 has the following (1) to (4) (Fig. 3(a) to
(1) The camera shown in FIG. 3(a) is of a normal winding type, and the cartridge 2 is loaded on the left side when viewed from the back of the camera. Here, the normal winding method is a method in which the film is wound one frame at a time each time one frame is taken.On the other hand, when loading the film, the film is wound once to the end, and one frame at a time is transferred to the cartridge 2 each time the film is taken. The method of rewinding is called the prewind method.

(2) The camera shown in FIG. 3(b) is of a prewind type, and the cartridge 2 is loaded on the left side when viewed from the back of the camera.

(3) The camera shown in FIG. 3(c) is of a normal winding type, and the cartridge 2 is loaded on the right side when viewed from the back of the camera.

(4) The camera shown in FIG. 3(d) is a pre-wind type camera in which the cartridge 2 is loaded on the right side when viewed from the back of the camera.

Here, the posture of the cartridge in the vertical direction is different depending on whether the cartridge 2 is loaded on the left side or the case where it is loaded on the right side.

The camera 21 of (1) will be explained with reference to FIG. 3(a). Note that the back cover is not shown. 22 is a cartridge chamber in which the cartridge 2 is loaded; 23 is an aperture that defines the photographing screen; 24 and 25 are inner and outer rails for film positioning; 26 is a film winding lisbourg; 27 is a film winder that accommodates the spool 26. 28 is a finder. Further, 29b, 29c, 29d are lamps, and each lamp 29b, 29c, 29d is connected to the film 1.
When the screen 10 of any frame faces the aperture 23, it faces the frame numbers at positions 3, c, and d corresponding to that frame, respectively. FIG. 5 is a longitudinal cross-sectional view of the lamps 29d and 29b, and 30 is a pressure plate (provided on the back cover) that presses the film against the aperture 23.

In the camera 21 as described above, when each frame is photographed (at this time, the predetermined screen 10 faces the aperture 23).
When the lamps 29b, 29c, and 29d are turned on, the frame numbers (unsuitable frame numbers) of each type (non-conforming frame numbers), among the frame numbers written as latent images on the film 1, are emitted by the lamps 29b, 29d.
It is erased by the light emission of 9c and 29cl. When this film 1 is developed, only the frame number at position a of the developed negative 1a is displayed, as shown at 18 in FIG. 4(a), and the frame numbers for types b, c, and d are displayed in black. It becomes a round shape and becomes invisible.

Here, the frame numbers of a are numbered as 1, 2, 3°...36 from the screen 10 on the leading edge of the film to the screen 10 on the trailing edge, so the normal winding method was adopted ( 1
), the frame number and the photographing order match, and from the perspective of the winding system, it can be said that the frame number at position a is suitable for camera 21 in (1). Furthermore, when photographing is performed with the camera 21 in the normal horizontal position, the vertical direction of each screen 1o of the negative 1a matches the vertical direction of the displayed frame numbers, making it easier to see. Therefore, it can be said that the frame number at position a is suitable for the camera 21 even when viewed from the display direction of the frame number.

Next, the camera 31 of (2) will be explained with reference to FIG. 3(b). The members designated by numerals 32 to 28 are respectively shown in FIG. 3(a).
) are the same as the members indicated by numerals 22 to 28, and their explanation will be omitted. 39a, 39c.

Reference numeral 39d denotes a lamp for erasing the frame numbers of latent images at positions a, c, and d of the film 1 by emitting light. The cross sections of the lamps 39a, 39c, and 39d are similar to those shown in FIG. Film 1 taken with such a camera 31
The developed negative is shown as 1b in Figure 4(b),
Only the piece number at the lower left position is displayed, and the lamps 39a, 39
Due to the light emission of c and 39d, the frame numbers of types a, c, and d become black round shapes and become invisible.Here, the frame numbers at position b are from screen 1o on the leading edge of the film to screen 1o on the trailing edge. 36°35.34・
...1, so the frame number and shooting order match for the camera 31 in (2) that uses the prewind method, and from the perspective of the winding method, It can be said that the frame number at the position is suitable for the camera 31. When shooting with the camera 31 in the normal horizontal position,
Since the vertical direction of each screen 10 of the negative 1a matches the vertical direction of the displayed frame numbers, it can be said that it is suitable for the camera 31 from the viewpoint of the display direction of the frame numbers.

FIG. 3(c) shows the camera 41 in (3) above, and the reference numerals 42 to 48 respectively correspond to the reference numerals 22 to 28 in FIG. 3(a).
This is the same member as shown in . 49a.

Reference numerals 49b and 49d are lamps for erasing the frame numbers of the latent images at positions a, b, and d, respectively, by emitting light. A negative 1c developed from a film 1 taken with such a camera 41
As shown in Fig. 4(c), only the piece number at the upper right position C is displayed, and the piece numbers of types a, b, and d become black round shapes due to the light emission of lamps 49a, 49b, and 49d. Become invisible. For the same reason as mentioned above, the frame number at position C can be said to be suitable for the camera 41 both from the winding system and from the cartridge loading position.

Furthermore, FIG. 3(d) shows the camera 51 of the above-mentioned (4), and each of the reference numerals 52 to 58 corresponds to the reference numeral 22 of FIG. 3(a).
It is the same as the member shown by 28.

Reference numerals 59a, 59b, and 49c are lamps for erasing the frame numbers of the latent images at positions a, b, and c, respectively, by emitting light. The negative 1d obtained by developing the film 1 photographed with such a camera 51 displays only the frame number at the lower left position d, as shown in FIG. c The piece number at each position becomes a black round shape and becomes invisible. The frame number at position d is suitable for the camera 41 both from the winding system and from the cartridge loading position.

Although the above description has been made regarding a negative type film, the present invention can also be applied to a reversal type film, in which case a white round shape is formed on the developed film due to the light emitted from the lamp. Further, with the above-mentioned 135-inch film, depending on the loading condition of the film, the frame number written in the latent image may not be in the correct screen position. In such a case, the light-emitting part of the lamp is shaped like an oval (29b') like the camera 21' shown in FIG.

29c', 29d'), it is possible to reliably erase unsuitable piece numbers (piece numbers at positions b, c, and d) even if the positions of the pieces are slightly shifted.

Note that the camera 21' in FIG. 6 is the same as the camera 2 in FIG. 3(a).
Lamps 29 b and 29 c are the light emitting parts of 1.

29d has an oval shape, but it is similar to that shown in Fig. 3 (
If the cameras 31, 41, and 51 shown in b) to 3(d) also each have an oval lamp, unnecessary frame numbers can be reliably erased in response to a shift in the frame position.

Furthermore, as shown in Fig. 7, if a film 1' with one perforation per frame is used and applied to a camera that detects this perforation and aligns the film, the latent image will be written. Since the screen can be positioned accurately with respect to the piece number, as shown in Figure 3 (
Cameras 21, 31, 41.5 shown in a) to FIG. 3(d)
1 can be used to reliably delete non-conforming piece numbers.

FIG. 1 is a block diagram of the above-mentioned camera, which is the same whether it is a normal winding type camera or a prewind type camera.

101 is a microcomputer (hereinafter referred to as microcomputer) that controls the entire sequence of the camera, and a battery 103
Powered by 105 is a back cover detection switch;
It turns off when the back cover is closed and turns on when it is opened. One end of this switch 105 is grounded, and the other end is the input port 1 of the microcomputer 101.
1 and is also connected to the battery 103 via a pull amplifier resistor 107. 109 is a cartridge detection switch, which is turned off when the cartridge is not loaded;
Turns on when the cartridge is loaded. One end of the switch 109 is grounded, and the other end is connected to the input port I of the microcomputer 101.
2 and is also connected to the battery 103 via a pull amplifier resistor 111.

113 is a release switch that is turned on when a release button (not shown) is pressed; one end is grounded, and the other end is connected to the human power port I3 of the microcomputer 101 and connected to the battery 103 via a pull-up resistor 115. has been done. Reference numeral 121 indicates the three lamps shown in FIGS. 3(a) to 3(d), respectively. That is, in the case of the camera 21 in FIG. 3(a), the lamp 121 corresponds to the lamps 29b, 29c, and 29d, and in the case of the camera 31 in FIG. 3(b), the lamp 121 corresponds to the lamps 39a, 39c, and 39d. Equivalent to. In the case of the camera 41 in FIG. 3(C), these correspond to lamps 49a, 49b, and 49d, and in the case of the camera 51 in FIG. 3(d), they correspond to lamps 59a, 59b, and 59c.

One end of the lamp 121 is connected to the battery, and the other end is connected to the collector of the transistor 123. The emitter of transistor 123 is grounded, and the base is connected to resistor 125.
It is connected to the output port 01 of the microcomputer 101 via. Therefore, the output of the microcomputer 101 is -01
When becomes high level, the transistor 123 is turned on and the lamp 121 emits light at the same time.

Reference numeral 127 denotes an exposure control device, which includes a shutter, an aperture, or an aperture control device, and controls exposure according to commands from the microcomputer 101. 129 is a film winding device, including a motor, a gear, and a winding Lisbourg.

This device consists of a motor control circuit, etc., and is used to wind the film around the take-up spool and feed the film by one frame according to commands from the microcomputer 101. Reference numeral 131 denotes a film movement amount detection device, which consists of a photo sensor such as a photo interrupter placed near the perforation of the film, and a pulse counter that counts the number of output pulses.
(corresponding to the number of perforations to be moved) is input to the microcomputer 101. 133 is a film rewinding device;
It consists of a motor, gears, rewind fork motor control circuit, etc., and rewinds the film into the cartridge.

Next, the control procedure by the microcomputer 101 will be explained with reference to the flowchart shown in FIG.

FIG. 8 is a flowchart showing the control of the normal winding type camera 21.41. This program starts when the battery 1.3 is connected, and first, in step S1, the state of the back cover detection switch 105, that is, the open/closed state of the back cover is determined based on the level of the input port 11. If the input port 11 is at a high level, it is determined that the switch 101 is off (the camera back is open), and the process remains in step S1.
If 1 is at a low level, it is determined that the switch 101 is on (back cover closed), and the process proceeds to step S2.

In step S2, the state of the cartridge detection switch 109, that is, the presence or absence of a cartridge is determined based on the level of the input port I2. If the input port I2 is at a high level, it is determined that the switch 109 is off (patrone not loaded), and the process returns to step s1. If the input port I2 is at a low level, it is determined that the switch 109 is on (a cartridge is present), and the process returns to step s1. Proceed to S3. In step s3, the film winder W129 is started to wind the film around a take-up spool (not shown), and in step S4, the output of the film movement amount detection device 131 is input to calculate the film movement amount. In step S5, it is determined whether the calculated film movement amount is a predetermined film winding amount (predetermined jump feed amount). If negative, the process returns to step s4, and if affirmative, the process proceeds to step S6.

In step S6, the operation of the film winding device 129 is stopped to stop winding the film around the take-up spool. Next, in step s7, it is determined whether the level release switch 113 of the input port 3 is in a state, that is, whether or not a release operation has been performed. If the input port ■3 is at a high level, it is determined that the switch 113 is off (no release operation), and the process remains in step S7. If the input port I3 is at a low level, it is determined that the switch 113 is on (with a release operation), and the process remains in step S8. Proceed to. In step S8, the subject brightness is input from a photometric element (not shown), and the film sensitivity is input from a film sensitivity setting device (not shown). Exposure calculation is performed by taking in various parameters necessary for exposure calculation, and the value is set to that value. The exposure control device 127 is controlled accordingly.

In other words, photographing is performed.

Thereafter, in step S9, the output port o1 is kept at a high level for a predetermined period of time to cause the three lamps 121 to emit light. As a result, the non-conforming piece numbers are deleted as described above. The light emitting time of the lamp 121 is set to be enough time to erase the frame number of the non-conforming latent image on the film. preferable.

Next, in step S10, time measurement is started and step Sll is started.
Proceed to. This timing is used to determine whether or not one frame of film can be wound within a predetermined time.The 6-step Sll starts the operation of the film winding device 129.
Wind the film. In step SL2, the output of the film movement amount detection device 131 is input to calculate the film movement amount, and in step S13, it is determined whether the calculated film movement amount has reached the movement amount of one frame. If step S13 is affirmed, time measurement is stopped in step S14 and the process returns to step S7; if step S13 is negative, step S1
Proceed to step 5.

In step S15, it is determined whether or not the time period started in step S10 has reached a predetermined time. If the predetermined time has not elapsed, the process returns to step S12, and if the predetermined time has elapsed, the process proceeds to step S16. Here, if step 815 is affirmative, it means that the film 1 has not been wound by one frame even after the predetermined time has elapsed, and this means that the film 10 has been wound to the end. There is.

Therefore, in step S16, the operation of the film winding device 129 is stopped, and then in step S17, the time measurement is stopped. In step 818, the film rewinding device 133 is started to rewind the film into the cartridge. In step S19, time counting is started again. This time measurement is used to determine the end of film rewinding. In step S20, the output of the film movement amount detection device 131 is input to calculate the film movement amount.

In step S21, it is determined whether or not the film is being rewound by determining whether or not the film has moved based on the calculated film movement amount. If it is determined that the film has moved based on the amount of film movement, it is determined that the film is being rewound and the process proceeds to step S22, where the time measurement (started in step S19) is stopped and the process returns to step S19. If it is determined from the amount of film movement that there is no film movement, it is determined that the film is not being rewound, and step S2
3, it is determined whether or not the clocked time that started in step S19 has reached a predetermined time, and when the predetermined time has elapsed, it is determined that rewinding has finished, and the process proceeds to step S24, and if the predetermined time has not elapsed, rewinding has not yet been completed. It is determined that the process has not been completed and the process returns to step S20.

In step S24, the operation of the film rewinding device 133 is stopped, and then in step S25, the time measurement started in step S19 is stopped. In step S26, the state of the back cover detection switch 105, that is, the open/closed state of the back cover is determined based on the level of the input boat 11. If the back cover is closed, the process remains at step 326, and if the back cover is open, step S27 is performed.
Proceed to.

In step S27, the state of the patrone detection switch 109, that is, the presence or absence of a patrone is determined based on the level of the input port 2, and if there is a patrone, step S2
The process proceeds to step S6, and when there is no patrone, the process returns to step S1.

The above is the operation of a normal winding type camera.

Note that the lamp 121 may emit light before exposure control as shown in FIG. Further, FIG. 10 shows an example in which the lamp 121 emits light during fog control.

In FIG. 10, steps up to step S7 and steps after step S10 in FIG. 8 are the same. When step S7 is affirmed, time measurement is started in step S31 to measure the time required for lamp emission, and in step S32, the output port 01 is set to a high level and the lamp 121 starts to emit light. In step S33, similarly to step S8 in FIG. 8, the exposure control device 127 is controlled to perform photographing. Step S3
In Step 4, it is determined whether or not the time period started in Step S31 has elapsed beyond a predetermined time required for lamp emission. If negative, the process remains in Step S34, and if determined, the output port 01 is set to low level in Step S35. Lamp 12
1 stops emitting light.

Next, in step S36, the time measurement started in step S31 is stopped, and the process proceeds to step 510.

Next, the operation when applied to a prewind type camera will be explained with reference to the flowchart shown in FIG.

Steps Sl, S2, and steps S26 and subsequent steps are the same as those in FIG. 8, so illustration thereof is omitted. If step S2 is affirmed, the film winding device 129 is started to operate in step 5101 to start a prewind process for winding the film to the end on a winding spool (not shown), and step 5
In step 102, time measurement for determining the end of prewind is started. In step 5103, the output of the film movement amount detection device 131 is input to calculate the film movement amount, and in step 5104, the presence or absence of film movement is determined from the calculated film movement amount to determine whether or not prewinding is being performed. . If there is film movement, it is determined that prewinding is in progress and the process proceeds to step 5105; if there is no film movement, it is determined that prewinding is not in progress and the process proceeds to step 8106. In step 5105, the time measurement started in step 5102 is stopped and the process returns to step 5IO2.

In step 8106, it is determined whether the time measured from the start of time measurement in step 5102 has reached a predetermined time at which it can be determined that the prewind has ended. When the predetermined time has elapsed, it is determined that the prewind has ended, that is, the film has been wound to the end, and the process advances to step 5107. If the predetermined time has not elapsed, it is determined that the prewind has not been completed and the process returns to step 5103. In step 5107, the operation of the film winding device 129 is stopped to stop prewinding.

Next, in step 5108, the time measurement started in step 5IO2 is stopped, and in step 5109, the time measurement started in step 5IO2 is stopped.
The number N of frames that can be photographed is calculated from the movement amount calculation value in step 103, and the process proceeds to step 5110.

In step Sll○, it is determined whether or not a release operation has been performed in the same way as step S7 in FIG.
Proceed to step 11.

In step 5111, the exposure control device 127 is controlled to take a picture, and in step 8112, the lamp 121 is caused to emit light for a predetermined period of time. As a result, non-conforming piece numbers are deleted. Thereafter, in step 5113, the film rewinding device 133 is started to wind the film into the cartridge. In step 5114, the output of the film movement amount detection device 131 is input to calculate the film movement amount, and in step 5115, it is determined whether or not the calculated film movement amount is one frame. If the movement amount is less than one frame, the process returns to step 5114, and if the movement amount is one frame or more, the process proceeds to step 8116.

In step 8116, the operation of the film rewinding device 133 is stopped to stop winding the film into the cartridge. In step 5117, the number N of frames is incremented by "-1", and in step 8118, it is determined whether the number N of frames is 0 or not. If N≠0, it is determined that the photographing of all the frames has not been completed and the process returns to step 5ilo, and if N=O, it is determined that the photographing of all the frames has been completed and the process proceeds to step 5119. In step 5119, the film rewinding device 133 is operated for a predetermined period of time in order to completely wind up a portion of the film leader into the cartridge, and then the process proceeds to step S26.

The above is the operation of the prewind camera.

Incidentally, similarly to the normal winding type camera, the lamp may be emitted before exposure control as shown in FIG. 12. Further, as shown in FIG. 13, it may be performed during exposure control.

That is, in FIG. 13, step SLi.

If affirmative, time measurement is started in step 5121, and the lamp 121 is started to emit light in step 5122. In step 5123, exposure control (photography) is performed, and in step 5124, it is determined whether a predetermined time has elapsed since the start of time measurement in step 5121. If step 5124 is negative, the process waits until the result is affirmative, and if the result is negative, the lamp stops emitting light in step 5125. Thereafter, time measurement is stopped in step 8126 and the process proceeds to step 5113.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. 14 to 16.

In FIG. 14, the camera 80 of this embodiment is capable of selecting the above-mentioned normal winding method and prewinding method, and as shown in the figure, a and b on the film are selected.

Four lamps 80a corresponding to the piece numbers at each position c and d,
80b, 80c, and 80d are provided, respectively. The other configurations are the same as in FIG. 3(a).

FIG. 15 shows the control system of this camera 80.
Resistors 91a to 014 are connected to output ports 011 to 014 of 01'.
The four lamps 80a to 80d are connected via 91d and transistors 92a to 92d, respectively. Further, 93 is a hoisting method selection switch that is turned on and off by operating a hoisting method selection button (not shown), one end of which is grounded, the other end of which is connected to the input port E4 of the microcomputer 101' and is connected to a pull-up resistor. Battery 1 via 94
It is connected to 03. When this switch 93 is off, the normal winding method is selected, and when it is on, the prewind method is selected.

The other configurations are the same as in FIG. 1.

FIG. 16 shows the control procedure by the microcomputer 101', and only the parts different from those in FIGS. 8 and 11 are shown.

When step S2 is determined, it is determined in step 5201 which hoisting method is selected based on the state of the hoisting method selection switch 93.

If it is the normal winding method, the process advances to step 5202, and the lamps 80b and 80c are used as the lamps to emit light.

81d and then step 83 shown in FIG.
Perform the following processing. If the prewind method is used, the process proceeds to step 5203, and the lamp 8 is used as the lamp to emit light.
0a, 80c, and 80cl are selected, and then the processing from step 8101 shown in FIG. 11 is performed. When the lamp is emitted (step S9 or S112), only the lamp selected in step 5202 or 5203 is caused to emit light.

In this embodiment, as is clear from the flowchart of FIG. 16, the state of the winding method selection switch 93 is determined at step S2 when it is determined that there is a cartridge 2.
Even if an attempt is made to change the winding method using the switch 93 until the cartridge 2 is taken out, the change will not be accepted. That is, the winding method cannot be changed until shooting of the film is completed.

According to the above, when the normal winding method is selected, the lamps 80b, 80c, and 81d emit light at the same time as shooting, and as a result, as shown in FIG.

The piece numbers at each position d (incompatible piece numbers) are erased, and only the piece number at position a (appropriate piece number) is displayed. on the other hand,
When the prewind method is selected, the lamp 80
a, 80c, and 81d emit light, which causes Fig. 4(a)
As shown in a, c.

The piece numbers at each position d (inappropriate piece numbers) are erased, and only the piece number at position b (appropriate piece number) is displayed.

Although the second embodiment has been described with respect to a case where the cartridge is loaded on the left side when viewed from the back of the camera, it is of course applicable to a case where the cartridge is loaded on the right side.

Furthermore, the means for erasing the piece number is not limited to the above-mentioned lamp, but may also be an LED, for example. Furthermore, the size and position of the frame numbers recorded on the film are not limited to the above embodiments.

Effects of the F1 Invention According to the present invention, unsuitable frame numbers are erased by exposure from a plurality of types of frame numbers recorded as latent images corresponding to each frame of the film. Only the correct piece number can be displayed regardless of the loading posture.

[Brief explanation of drawings]

1 to 8 show a first embodiment of the present invention, FIG. 1 is a block diagram showing a control system of a camera according to the present invention, and FIG.
The figure shows the film used in the camera, Figures 3 (a) to (cl) are rear views showing the configuration of each camera, and Figure 4 shows the film used in the camera.
Figures (a) to (d) are views showing the films taken with the cameras in Figures 3 (a) to (d), respectively; Figure 5 is a sectional view showing the lamp mounting structure; Figures 6 and 7; FIG. 8 is a flowchart of the processing procedure of a camera using the normal shooting method; FIGS. 9 and 10 are flowcharts each showing a modification of the processing; and FIG. The figure is a flowchart showing the processing procedure of a prewind type camera, and FIGS. 12 and 13 are flowcharts showing modified examples of the processing procedure. 14 to 16 show a second embodiment of the present invention, FIG. 14 is a rear view showing the configuration of the camera, FIG. 15 is a block diagram of the control system, and FIG. 16 is a flowchart of the processing procedure. be. 1: Film 2: Patrone 29b, 29c, 29d, 39a, 39c, 39d, 4
9a, 49b, 49d, 59a, 59b, 59c, 80
a to 80d, 121: Lamp 101: Microcomputer

Claims (1)

[Scope of Claims] 1) A camera that alternately performs film frame feeding and photographing, wherein an incompatible frame number is selected from among a plurality of types of frame numbers recorded as latent images corresponding to each frame of the film. A camera capable of erasing nonconforming frame numbers, characterized by being equipped with erasing means for erasing by exposure. 2) On the film, both the frame number for the normal winding method and the frame number for the prewind method are recorded as latent images,
2. The camera according to claim 1, wherein the erasing means erases one of the frame numbers that is incompatible with the winding method of the camera. 3) Two types of frame numbers corresponding to the vertical loading position of the cartridge are recorded as latent images on the film, and the erasing means is capable of detecting which of the two types of frame numbers is incompatible with the cartridge loading position of the camera. 2. The camera capable of erasing nonconforming frame numbers according to claim 1, wherein the frame number of the nonconforming frame is erased. 4) Any one of claims 1 to 3, wherein the erasing means erases the unsuitable frame number corresponding to the frame during a period from the release operation to the start of frame advance of the frame exposed by the release operation. A camera that can erase the non-conforming piece numbers listed in the above section.