JPH0915713A - Camera - Google Patents

Abstract

PURPOSE: To imprint the print data instructing a print aspect ratio in a photographic film so as to discriminate clearly even with a simple structure. CONSTITUTION: One side terminal of a synchronous switch Sy of a stroboscopic circuit is connected to a plus terminal of a battery 48, and a light emitting diode 46 and a transistor Tr1 are connected to the terminal in series. The other side terminal of the synchronous switch Sy is connected to the base of the transistor Tr1 through a diode D1. The transistor Tr2 becomes a conductive state by short-circuiting the synchronous switch Sy, and the light emitting diode 46 is lighted by a drive current from the battery 48. A mark imprint plate 40 is provided movably between the light emitting diode 46 and the photographic film, and light from the light emitting diode 46 is controlled by an opening formed on the plate, and the number of dot marks answering the selected print aspect ratio are imprinted in the edge part of the photographic film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera for printing print data indicating an aspect ratio of a print area on a photographic film.

[0002]

2. Description of the Related Art In recent years, the aspect ratio of the print area (hereinafter referred to as the print aspect ratio) has been expanded in order to further expand the appeal and enjoyment of printed photographs to general users.
But different print pictures are offered. As such a print photograph, a standard print (89 mm x 127 mm, aspect ratio: 1.42), which is a conventional standard size.
In addition, the panorama print (89 mm x 252 mm, aspect ratio: 2.83) with doubled horizontal length,
A high-definition print (89 mm × 158 mm, aspect ratio: 1.78) that approximates the aspect ratio of a high-definition television broadcast screen is generally known. In addition,
The numbers in parentheses indicate the size and aspect ratio of the borderless print photograph, and the print aspect ratio and the aspect ratio of the print photograph match.

As a method of obtaining such a print photograph having a different print aspect ratio from a single photographic film, the exposure range for the photographic film is determined for each frame by a light shield plate provided in a camera or a film unit with a lens. Standard print exposure range (24mm x 36m
m), panorama print exposure range (13 mm x 36 m
m) and high-definition print exposure range (20 mm x
36 mm) and a method of shooting all the frames with a single exposure range fixed to the photo film and imprinting print data showing the print aspect ratio intended by the photographer for each frame. is there.

In the former method, since the exposure range differs depending on the print aspect ratio, the print aspect ratio can be clearly discriminated. However, the light-shielding plate that regulates the exposure range and the complicated movement for moving the light-shielding plate. Since a mechanism and the like must be newly added, an increase in manufacturing cost cannot be avoided. In particular, in a compact camera or a lens-fitted film unit, which is characterized by low price, an increase in manufacturing cost is a serious problem.

On the other hand, in the latter method, it is necessary for each photographer to select a print aspect ratio intended by the photographer and to imprint print data indicating the print aspect ratio on the photographic film. As such a camera, one described in Japanese Patent Laid-Open No. 4-328537 is known. According to this camera, when the photographer uses the fixed exposure range to the full extent, the field of view of the finder is switched to a range corresponding to this range. At this time, the print data is not recorded on the photo film. Also, for example, if you select the panorama size, the viewfinder frame will be switched to the panorama size, and the panorama code signal plate will enter the fixed exposure range of the photo film, and the panorama will be generated by the subject light that has passed through the taking lens. The shape of the signal code signal plate is recorded in the exposure range of the photographic film as a panoramic identification code.

The photographic film thus photographed is subjected to a developing process, the identification code is read by a printing device, and a print photograph is created with a print aspect ratio intended by the photographer for each photographed frame. This is convenient not only because it is not necessary to record the desired print size one frame at a time when a print request is made, but also because the operation of designating the print size for each shot frame is not required at the time of printing.

Although it is not intended to change the aspect ratio, a camera which is capable of obtaining a magnified print photograph as if it was photographed by a zoom lens by imprinting trimming information on the photograph film. Is known from JP-A-54-26721. This trimming information is obtained by selectively lighting the light emitting diodes according to the selected trimming size by using a plurality of light emitting diodes arranged below the aperture of the camera so as to have different intervals according to the trimming size number. , Imprinted on the edge of the photo film. At the time of printing, the trimming information is read according to the number of marks and the distance between the marks printed on the photo film, and the zoom lens of the printer is driven according to the trimming information to print a print photograph with an intended angle of view.

[0008]

However, in the camera described in Japanese Patent Laid-Open No. 4-328537, the print data is recorded by using a part of the subject light that has passed through the taking lens. If the light does not have a sufficient amount of light, there is a problem that print data cannot be clearly recorded, and density unevenness occurs due to shooting conditions, making it impossible to identify print data.
For example, when there is a black subject around the print data recording, the unexposed portion due to the shape of the code signal plate cannot be distinguished from the black image around it, and the print data cannot be identified.

In the camera described in Japanese Patent Laid-Open No. 54-26721, a mark is imprinted on the edge of the photographic film with a light emitting diode, so that there is no inconvenience that the print data cannot be identified depending on the photographing conditions. Since it requires a dedicated timer circuit for controlling the light emission time by driving a plurality of light emitting diodes in conjunction with the shutter, it was difficult to apply to a low-cost compact camera or a film unit with a lens. .

The present invention has been made in view of the above problems, and provides a camera which has a simple and low-cost structure, and which prints on a photographic film so that print data indicating a print aspect ratio can be clearly identified. With the goal.

[0011]

In order to achieve the above object, the present invention provides a synchro switch of a strobe circuit which is short-circuited by a shutter release, and a driving current is supplied from a power source of a camera by the short circuit of the synchro switch.
A light emitting unit that emits light toward the photographic film, an external operating member that is operated when setting the print aspect ratio, and an irradiation range of light that responds to the external operating member and that reaches the photographic film from the light emitting unit. And a mark imprinting member for regulating the number of marks imprinted on the photographic film.

[0012]

The shutter is released after the print aspect ratio is set by operating the external operating member. Along with this, the synchro switch is short-circuited, a drive current is supplied from the power source of the camera to the light emitting means, and the light emitting means emits light toward the photographic film. This light is regulated by the mark imprinting member according to the set print aspect ratio, the number of marks imprinted on the photo film changes, and the print data indicating the print aspect ratio is imprinted on the photo film. As described above, the light emitting means is driven by using both the synchro switch of the strobe circuit and the power source, so that the print aspect ratio indicating mark can be imprinted on the photographic film at a low cost with a simple structure. Further, since the mark imprinted by the light emitting means is constant regardless of the brightness of the photographing screen, the print data represented by this mark can be easily identified and the print aspect ratio can be surely specified.

If a transistor which is turned on by the short circuit of the synchro switch is connected to the light emitting means, and a diode is provided between the base of the synchro switch and the synchro switch, the emitter of the transistor faces the synchro switch. Leakage current flowing is prevented. If a capacitor is provided between the diode and the emitter of the transistor, chattering of the synchro switch is prevented. Further, in a camera with a single shutter speed, the short-circuit time of the synchro switch is almost constant, so that the exposure amount for image capture can be constant.

When the collector of the transistor which is turned on by the short circuit of the synchro switch and the base of the oscillation transistor of the strobe circuit are connected via a diode, charging of the strobe circuit is prohibited when the synchro switch is short circuited. Become. As a result, if an image is taken while the strobe circuit is being charged, the drive voltage required to light the light emitting means will not be sufficiently secured, and the light emitting means will not light up, or even if it is lighted up, the amount of light will be insufficient and the mark will have sufficient density. It prevents the troubles such as not being recorded on the recording medium from being recorded, and the marks are always printed stably. Further, if the number of the light emitting means is one, the mark for designating the print aspect ratio can be imprinted on the photographic film at a lower cost.

[0015]

FIG. 2 shows a simplified camera embodying the present invention.
In the front of the camera body 11, a taking lens 12, a finder 13 and a stroboscopic light emitting section 14 are provided. Further, on the upper part of the camera body 11, an operation knob 15 for selecting a print mode, a window 16 for displaying the number of shots, a shutter button 17, a winding knob 18, a charging switch 19 for a strobe, and a light when the charging is completed. A neon tube 20 is provided, and a slit 21 that allows the sliding movement of the operation knob 15 is formed on the side of the operation knob 15. The characters "C", "H", and "P" indicating the type of print mode are engraved along the edge of the slit 21.

When the operation knob 15 is slid and adjusted to the positions of the characters "C", "H", and "P", the standard (conventional) print mode, high-definition print mode, and panoramic print mode are respectively selected. A print aspect ratio corresponding to each print mode is designated. Aspect ratio of 1.42 in standard print mode (aspect ratio of L size print of old standard), 1.
Aspect ratio of 78, 2. in panorama print mode.
The aspect ratio of 83 will be specified. For example, the standard print (89 mm x 1
27 mm), HDTV print (89 mm x 158)
mm) and panoramic print (89 mm × 254 mm).

As shown in FIG. 3, the photographic film 25 used in this embodiment is provided with two perforations 25a at each end of each photographic frame already proposed by the present applicant. Format,
The size of the full-size screen on the photo film 25 is 1
5.6 mm x 27.4 mm (aspect ratio: 1.76)
And is almost the same as the aspect ratio of high-definition print (1.78). In the camera of the present embodiment, the aperture (not shown) is formed in this full size, and each photographed frame of the photo film 25 is always exposed in full size, that is, high definition size.

In FIG. 4, below the operation knob 15,
A visual field mask 30 is provided integrally with the operation knob 15 via the connecting portion 30a. The visual field mask 30 is made of, for example, a light-shielding plastic mixed with carbon black, and is put into and taken out of the finder 13 when the operation knob 15 is slid. The visual field mask 30 includes a high-definition visual field frame 31 for displaying a full-size standard visual field, a panoramic visual field frame 32 for displaying a visual field of a panoramic screen, and a standard visual field frame 33 for displaying a visual field of a standard screen of an old standard. They are formed side by side. In addition, semicircular locking notches 35, 36, 3 are formed on the lower edge of the field mask 30 at positions corresponding to these field frames 31, 32, 33.
7 is formed, and constitutes a click-stop mechanism with an elastic projection (not shown) provided below this. Reference numeral 13a is an eyepiece window of the finder 13.

Below the visual field mask 30, a mark imprinting plate 4 for imprinting dot marks on the photographic film 25 as print data for instructing the print aspect ratio.
0 is integrally provided via the arm portion 40a. The mark imprinting plate 40 is arranged at a position close to the edge of the photographic film 25. On the mark imprinting plate 40, one dot mark imprinting opening 41 is provided at a position corresponding to the panoramic visual field frame 32 of the visual field mask 30, and two dot mark imprinting adjacent to a position corresponding to the standard visual field frame 33. Openings 42 and 43 are formed respectively. In addition,
The dot mark imprinting openings 42, 43 are juxtaposed in the sliding direction of the mark imprinting plate 40 (the length direction of the photographic film 25).

The standard field frame 33 evenly faces the two dot mark imprinting openings 42 and 43 in a state where the standard view frame 33 is click-stopped in the finder 13, and a mark is formed at a slight distance from the photographic film 25. A cylindrical light emitting portion 45 is arranged at a position sandwiching the image capturing plate 40 (see FIG. 5). A rectangular opening 45a is formed on the side of the light emitting portion 45 facing the mark imprinting plate 40, and a light emitting diode 46 is incorporated therein. In this state, the light emitting diode 46
When is turned on, the light emitted from the light emitting diode 46 passes through the opening 45a and the dot mark imprinting openings 42 and 43, and print data 53 consisting of two dot marks 51 and 52 at the edge of the photographic film 25. That is, the print data 5 that specifies the aspect ratio for standard printing
Imprint 3 (see FIG. 3).

In the state where the panoramic field frame 32 is click-stopped in the viewfinder 13, as shown in FIG.
1 between the opening 45a of the light emitting portion 45 and the photographic film 25
The individual dot mark imprinting openings 41 are set, and print data 55 consisting of one dot mark 54 indicating the aspect ratio for panoramic printing is imprinted on the edge of the photographic film 25 (see FIG. 3). Further, when the high-definition visual field frame 31 is click-stopped in the finder 13, the opening 45a of the light emitting portion 45 is shielded by a portion where the opening of the mark imprinting plate 40 is not formed,
No dot mark is printed on the photographic film 25. In other words, the photographed frame in which nothing is imprinted on the edge is printed at the high-definition print aspect ratio.

Discharge tube 4 housed in strobe light emitting section 14.
In FIG. 1, which shows a strobe circuit for making 7 emit light, the anode of the light emitting diode 46 is connected to one terminal of the synchro switch Sy and is also connected to the plus terminal of the battery 48 for power supply. The cathode of the light emitting diode 46 is connected to the collector of the transistor Tr1, and the base of the transistor Tr1 is connected to the other terminal of the synchro switch Sy via the diode D1. The emitter of the transistor Tr1 is grounded (GND), and the capacitor C for preventing chattering of the synchro switch Sy is connected between the diodes D1 and GND.

When the synchro switch Sy is short-circuited by pressing the shutter button 17, a base current flows from the battery 48 into the transistor Tr1 through the diode D1 and the transistor Tr1 is turned on. When the transistor Tr1 is turned on, a predetermined drive current is supplied from the battery 48 to the light emitting diode 46, and the light emitting diode 4
6 is turned on.

In the strobe circuit of this embodiment, when the charge switch 19 is turned on and the oscillation transistor Tr2 is operated, an electromotive force having a potential difference of -300 V from the secondary coil 49a of the oscillation transformer 49 is generated. However, this is a negative charging type that charges the main capacitor 50. Therefore, -30 from the GND side
A leak current is generated in the 0V direction, which is prevented by the diode D1.

When the charging switch 19 is turned on and the main capacitor 50 is being charged, the electromotive force of the battery 48 decreases, so that the battery 48 supplies power to the light emitting diode 46 even if the synchro switch Sy is short-circuited. Drive current is reduced. As a result, there arises a problem that the light emitting diode 46 is not turned on, or even if it is turned on, the dot mark is not recorded in a sufficient density due to insufficient light amount.
In order to avoid such trouble, the base of the oscillation transistor Tr2 and the collector of the transistor Tr1 are connected via the diode D2. As a result, with the charging switch 19 turned on, the synchro switch S
When y is short-circuited, the base current of the oscillation transistor Tr2 is grounded via the transistor Tr1 in the conductive state,
The operation of the oscillation transistor Tr2 is stopped. Therefore, when the synchro switch Sy is short-circuited, the drive current necessary for lighting the light emitting diode 46 is stably supplied from the battery 48 regardless of whether the charging switch 19 is ON or OFF, and the light emitting diode 46 is reliably lighted. It
The diode D2 is for blocking the flow of current from the battery 48 to the light emitting diode 46 via the base of the oscillation transistor Tr2.

In order to use the camera thus constructed, the photographer first slides the operation knob 15 according to his / her subject and his / her preference to select a desired print mode. For example, when the operation knob 15 is slid to the right end (the left end in FIG. 2) and set to the position of the character “C”, the standard print mode is selected and the viewfinder 13 is selected.
A standard visual field frame 33 of the visual field mask 30 is set therein.
As a result, the field of view of the finder 13 becomes narrower than that of the high-definition visual field frame 31 corresponding to the high-definition print mode, and the standard visual field is blocked corresponding to the standard print mode with a certain width left and right blocked. Also, the field mask 3
The mark imprinting plate 40 also slides with the slide movement of 0, and the standard visual field frame 33 is set in the finder 13. At the same time, as shown in FIG. 5, two dot mark imprinting openings 42, 43 are formed. It faces the opening 45 a of the light emitting unit 45.

When flash photography is to be performed after selecting the print mode, the charging switch 19 is turned on. As a result, the oscillating transistor Tr2 starts to operate and the voltage of the battery 48 is boosted by the oscillating transformer 49.
0 and the trigger capacitor 61 are charged. When the charging of the main capacitor 50 progresses and the voltage between both terminals of the main capacitor 50 reaches the specified charging voltage, the neon tube 2
0 lights up.

After confirming that the neon tube 20 is turned on and the stroboscopic light emission is ready, the photographer looks into the eyepiece window 13a of the finder 13 and puts the subject in the standard visual field frame 33 for framing. After confirming that the desired composition is obtained, the shutter button 17 is pressed down. The synchro switch Sy is short-circuited at the next moment when the shutter device is activated and the shutter blades are fully opened. As a result, the transistor Tr1 becomes conductive, a predetermined drive current is supplied from the battery 48 of the strobe circuit to the light emitting diode 46, and the light emitting diode 46 is turned on. The light emitted from the light emitting diode 46 passes through the dot mark imprinting openings 42 and 43 of the mark imprinting plate 40 and is exposed to the photographic film 25.

On the other hand, at the moment when the synchro switch Sy is short-circuited, the primary side trigger circuit becomes a closed circuit and the trigger capacitor 61 is discharged. The current generated by this discharge flows through the primary coil 62a of the trigger transformer 62, and the secondary coil 6
A trigger voltage is generated in 2b, and this trigger voltage is applied to the trigger electrode 47a. As a result, the electric charge of the main capacitor 50 is discharged between both electrodes of the discharge tube 47, the discharge tube 47 emits light, the strobe light is emitted from the strobe light emitting section 14, and stroboscopic photography is performed.

As a result, as shown in FIG. 3, a full-size (high-definition-size) subject image is exposed on the n-th frame 57 of the photo film 25, and the photo film 25 outside the exposure range is exposed. The print data 53, which is composed of two rectangular dot marks 51 and 52 having substantially the same shape as the dot mark opening 42 and 43, is exposed at the edge of the.

After the charging switch 19 is kept ON, the winding knob 18 is operated to wind the film for one frame and charge the shutter, and then the operating knob 15 is set to the character "P" position at the left end. When the panorama print mode is selected, the panorama view frame 32 is displayed in the viewfinder 13.
Is set, and the visual field range of the finder 13 changes to an elongated finder visual field range in which the upper and lower fixed widths are blocked in correspondence with the panoramic print mode. Further, between the light emitting portion 45 and the photographic film 25, one dot mark opening 41 is set. Then, the shutter button 17 is pressed.

The pressing operation of the shutter button 17 is performed before the neon tube 20 is turned on, that is, the main condenser 50.
If the trigger capacitor 61 is charged before the voltage required for flash emission is reached, the discharge tube 47 does not emit light and the transistor Tr1 becomes conductive at the moment when the shutter blades are fully opened. As a result, the base current to the oscillation transistor Tr2 is grounded via the transistor Tr1, the operation of the oscillation transistor Tr2 is stopped, the charging of the main capacitor 50 and the trigger capacitor 61 is stopped, and at the same time, the battery 48 is stabilized. A predetermined drive current is supplied to the light emitting diode 46, and the light emitting diode 46 is normally turned on. As a result, as shown in FIG. 3, a full-size subject image is exposed on the (n + 1) th shooting frame 58 of the photographic film 25, and a dot mark imprinting opening 41 is formed at the edge of the photographic film 25. One rectangular dot mark 54 of almost the same shape
The print data 55 consisting of is exposed.

When the synchro switch Sy is turned off,
Since the transistor Tr1 is turned off, the base current is supplied to the oscillation transistor Tr2, the oscillation transistor Tr2 becomes conductive, and the charging of the main capacitor 50 and the trigger capacitor 61 is restarted.

When performing natural light photography, the charging switch 19 is turned off. When the high-definition print mode is selected by setting the operation knob 15 to the central character “H” position, the high-definition field frame 3 is displayed in the viewfinder 13.
1 is set, and the visual field range of the finder 13 becomes a visual field corresponding to the full size. At the same time, the opening 45a of the light emitting portion 45 is covered with the portion of the mark imprinting plate 40 where the opening is not formed. When the shutter button 17 is pressed down after the film is wound up for one frame, a full-size subject image is exposed on the (n + 2) th imaged frame 59 of the photographic film 25, as shown in FIG. At the same time, the light emitting diode 46 is turned on, but since the opening 45a of the light emitting portion 45 is closed by the mark imprinting plate 40, nothing is imprinted on the edge of the photographic film 25.

In this way, while the desired print mode is selected, the photographing is sequentially performed, and after the photographing of all frames is completed, the photographic film 25 is stored in the film cartridge. After that, the film cartridge is taken out from the camera, and development and printing are requested to a development store such as a minilab.

As shown in FIG. 3, the developed photographic film 25 is placed outside the photographic range of each photographic frame corresponding to the panorama selected at the time of photography and each standard print mode.
One or two dot marks are recorded in black. At the time of printing, the print data including the dot marks is visually confirmed or automatically read frame by frame. Then, the photographed frame in which the dot mark is not exposed is printed at a high-definition print aspect ratio on the printing paper. Further, the photographing frame 57 in which the two dot marks 51 and 52 are recorded is indicated by dotted lines 57a and 57 in FIG.
The photographed image 58 in which the subject image in the area of b, that is, the area of the standard print aspect ratio, and one dot mark 54 is recorded, is in the area of the panoramic print aspect ratio in the area of the dotted lines 58a and 58b in FIG. Each subject image is printed on photographic paper.

Incidentally, the dot marks 51, 52, 54
Is printed outside the shooting range, print data 5
It is also possible to print with other print aspect ratios without being restricted by the print aspect ratios designated by 3,55.

In FIG. 7, which shows another embodiment in which the light emitting diode 46 is driven by a strobe circuit which carries out positive charging with a potential difference of +300 V with respect to GND, in this circuit, the connecting direction of the diode D1 is opposite to that of the previous embodiment. At the same time, the transistor Tr3 for controlling the lighting of the light emitting diode 46 is of PNP type. The positive electrode (VBATT) of the battery of the strobe circuit is connected to the emitter of the transistor Tr3, and the collector of the transistor Tr3 is connected to the anode of the light emitting diode 46. When the synchro switch Sy is short-circuited due to the pressing operation of the shutter button 17, a current flows from the base of the transistor Tr3 toward the synchro switch Sy, and the transistor T3 is turned on.
r3 becomes conductive and a driving current is supplied from the battery of the strobe circuit to the light emitting diode 46,
6 lights up.

Although the embodiment described above is a simple camera, the present invention loads a photographic film into a unit main body equipped with a strobe device and a simple exposure mechanism in advance at the time of manufacturing to load and rewind the photographic film. It can also be applied to a film unit with a lens that is no longer needed. Further, although the number of light emitting diodes is one in the above embodiment, the present invention is not limited to this, and a plurality of light emitting diodes may be used, for example, one light emitting diode may be provided for each opening.

[0040]

As described above, according to the camera of the present invention, the light emitting means is driven by the power source of the camera and the synchro switch, and the light emitted from the light emitting means is regulated by the mark imprinting member. Since the number of marks printed on the photographic film is changed, a new dedicated circuit for driving the light emitting means is unnecessary, so a mark for print aspect ratio instruction can be provided at a low cost with a simple structure. It can be imprinted on a photo film. Also, the mark imprinted by the light emitting means,
Since it is constant regardless of the brightness of the shooting screen, the print data can be easily identified by the mark, and the print aspect ratio can be reliably specified.

Further, a leak current flowing from the emitter side of the transistor toward the synchro switch is provided by connecting a transistor which is turned on by a short circuit of the synchro switch to the light emitting means and providing a diode between the base of the transistor and the synchro switch. Can be prevented.
If a capacitor is provided between the diode and the emitter of the transistor, chattering of the synchro switch can be prevented.

Further, by connecting the collector of the transistor which is turned on by the short circuit of the synchro switch and the base of the oscillation transistor of the strobe circuit through the diode, the charging of the strobe circuit can be prohibited when the synchro switch is short circuited. it can. This makes it possible to reliably supply a current of a predetermined voltage to the light emitting means even during charging of the strobe circuit. As a result, it is possible to avoid troubles such as the light emitting means not being turned on, and even if the light emitting means is turned on, the amount of light is insufficient so that the mark is not recorded at a sufficient density, so that stable marking can be always performed. Further, if the number of light emitting means is one, the mark can be imprinted at a lower cost.

[Brief description of the drawings]

FIG. 1 is a circuit diagram for lighting a light emitting diode according to the present invention, which also serves as a power source and a synchro switch of a camera for negative charging.

FIG. 2 is a perspective view showing the appearance of the camera of the present invention.

FIG. 3 is an explanatory view showing a part of a photographic film on which dot marks are imprinted.

FIG. 4 is an explanatory view showing a field mask and a mark imprinting plate.

FIG. 5 is an explanatory diagram showing a relationship between a photo film and two openings of a light emitting unit and a mark imprinting plate.

FIG. 6 is an explanatory diagram showing a relationship between a light emitting portion, one opening of a mark imprinting plate, and a photographic film.

FIG. 7 is a circuit diagram in which a light emitting diode is turned on by using a power source and a synchro switch of a camera for positive charging.

[Explanation of symbols]

 13 Finder 15 Control Knob 19 Charge Switch 25 Photo Film 30 Field Mask 31, 32, 33 Field Frame 40 Mark Image Plate 41, 42, 43 Dot Mark Image Aperture 45 Light Emitting Unit 46 Light Emitting Diode 48 Battery 51, 52, 54 Dot mark 53, 55 Print data C Capacitor D1, D2 Diode Sy Synchro switch Tr1, Tr2, Tr3 Transistor

Claims (5)

[Claims] 1. A synchro switch of a strobe circuit which is short-circuited by a shutter release, a light emitting means which supplies a drive current from a power source of a camera by the short circuit of the synchro switch and emits light toward a photographic film, and a print aspect ratio. And an external operating member that is operated when setting, and limits the irradiation range of light that reaches the photographic film from the light emitting means in response to the external operating member to change the number of marks to be imprinted on the photographic film. A camera provided with a mark imprinting member. 2. The light emitting means is connected to a transistor that is turned on by a short circuit of the synchro switch, and a diode is provided between the base of the transistor and the synchro switch.
The described camera. 3. The camera according to claim 2, wherein a capacitor is provided between the diode and the emitter of the transistor. 4. The charging of the strobe circuit is prohibited when the sync switch is short-circuited by connecting the collector of the transistor which is turned on by the short circuit of the sync switch and the base of the oscillation transistor of the strobe circuit via a diode. 3. The method according to claim 2, wherein
Or the camera of 3. 5. The camera according to claim 1, wherein the number of the light emitting means is one.