JPH0468326A - Red-eye preventing camera - Google Patents

Abstract

PURPOSE:To perform pre-flash only when necessary by correcting a distance where pupil-closing pre-flash is carried out by the use of a judging means. CONSTITUTION:When the lens judging means 55 judges that, for example, a wide angle lens is used, a person at a distance, where the red-eye phenomenon may occur with the wide angle lens, appears small. Even if the red-eye phenomenon occurs, it is hardly visible, and the red-eye occurrence distance is made longer. That is, the distance in which pre-flash is inhibited is corrected to be longer. On the other hand, when the lens judging means 55 judges that a telephoto lens is used, the person appears big, and the red-eye phenomenon is easily visible. Therefore, the red-eye phenomenon occurrence distance is corrected to be shorter, the distance or range where the pre-flash is inhibited, is made shorter. Thus, the red-eye preventing camera, which corrects the red-eye- occurrence distance calculated optically or geometrically and carries out pre- flash only when necessary, is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a red-eye prevention camera that performs pre-irradiation during strobe photography to suppress the occurrence of red-eye.

[Prior Art] Various red-eye prevention cameras have been proposed in the past, but generally, prior to flash photography, pre-irradiation is performed to close the pupils of the subject's eyes, thereby suppressing the occurrence of red eye during flash photography. It is supposed to be done. Conventionally, in order to prevent red-eye, pre-irradiation was performed during flash photography regardless of the shooting distance. As a result, pre-irradiation is performed even at distances where red-eye does not occur, which wastes energy.Also, before releasing the camera, the camera always waits for a certain period of time until the pupil closes, even at a distance where red-eye does not occur, so there is no chance of taking a photo. It had the disadvantage of letting you run away.

Therefore, Japanese Patent Laid-Open No. 1-235932 proposes a red-eye prevention camera that prohibits pre-irradiation at distances where red-eye does not occur.

[Problems to be Solved by the Invention] The above-mentioned red-eye prevention camera does not perform pre-irradiation when the distance is close enough that red-eye will not occur even when shooting with a strobe, so there is no need for wasted energy consumption. However, I rarely miss photo opportunities.
There are still deficiencies and room for improvement. In other words, in the conventional red-eye prevention camera described above, the red-eye occurrence distance is only calculated optically or geometrically, and other conditions are not taken into consideration. I'm doing a lot of work.

Therefore, the present invention further modifies the optically or geometrically calculated red-eye occurrence distance, and only when necessary,
Alternatively, it is an object of the present invention to provide a red-eye prevention camera that performs pre-irradiation only at a necessary distance.

[Means for Solving the Problems] In order to achieve the above object, the present invention performs pre-irradiation prior to release to close the pupils of the subject's eyes, thereby preventing red-eye phenomenon from occurring in strobe photography at the time of release. The camera is equipped with a lens determining means for determining the type of lens, and the lens determining means determines the distance at which pre-irradiation is performed at a distance at which red eye occurs based on focal length information of the lens. configured to be modified by

Further, in the invention according to claim 2, when the lens determination means determines that the lens is a wide-angle lens, the distance at which the pre-irradiation is performed is corrected to be larger, and when the lens is determined to be a telephoto lens, the distance at which the pre-irradiation is performed is corrected to be smaller. Ru.

[Function] When pre-irradiation is performed, energy is lost and photo opportunities are missed, so it is desirable that the distance at which pre-irradiation is not performed is as wide as possible, that is, it is far away. Therefore, in the present invention, if the lens determining means determines that it is a wide-angle lens, the person will appear small at a long distance where red-eye is likely to occur with a wide-angle lens, and even if red-eye occurs, it will be hardly noticeable, so the distance at which red-eye will occur will Corrected far away. In other words, the distance at which pre-irradiation is prohibited is modified to be more narrow.

On the other hand, if the lens determination means determines that it is a telephoto lens, the human image will appear larger and the red eye will stand out, so the distance at which red eye will occur will be corrected to a smaller value, and the distance or range at which pre-irradiation is prohibited will be narrower. (Become.

[Example] Before explaining the example, the conditions for the occurrence of red eye will be explained with reference to FIG.

In the figure, 1 is the camera body, 50 is the interchangeable lens,
Reference numeral 44 indicates a light emitting part of a strobe, and reference numeral 49 indicates a miniature lamp for pre-irradiation.

d, the vertical distance between the optical axis and the strobe 44 is h, and the angle between the optical axis and the straight line T connecting the subject's eye or pupil M and the strobe is θ.According to experiments conducted by the inventor of the present invention, the iris θuni is a black person. When the angle is 5 degrees or less, red eye occurs in people whose irises are not black when θz2 degrees or less. So, for example, if θ=2° and h=8.7cm, then d=
1/lan θxh=2.5m, and red-eye will not occur below 2.5m.

Therefore, it is not necessary to perform pre-irradiation when the distance to the subject is 2.5 m or less, but according to this embodiment, this distance is further modified as shown in the following table depending on the type of lens.

Table 1 Now, the present invention will be described in detail in terms of the distance between the subject's eyes and the miniature lamp 49 in terms of the second section.

FIG. 2 is a configuration diagram schematically showing the configuration of the main parts of the camera and lens TA drive device and circuit according to the embodiment. 1
Reference numeral 50 denotes a camera body, and 50 denotes an interchangeable lens body which is detachably attached to the camera body 1 and is connected to a camera-side bayonet mount 1a and a lens-side bayonet mount 51a, respectively. 3 is a main mirror, 4 is a pentaprism, 5 is an eyepiece lens, and 6 is a light receiving element for photometry. 7 is a photometric calculation circuit, which is connected to a film sensitivity information input circuit 8, a shutter control circuit 9, and a microcomputer 10. 34 is focal brain shutter 38
is the mirror rotation axis, 3b is the operating pin and the mirror drive cam 11
is facing. 12 is a mirror drive motor connected to a motor drive circuit 13. 14 is a motor for film winding/rewinding and a motor drive circuit 15
It is connected to the.

A distance measuring sensor 16 is connected to a distance measuring calculation circuit 17. 18 is the battery that operates the entire camera system, 1
Reference numeral 9 is a main power switch, and 20 is a DC/DCC/type converter connected from the battery 18 to the microcomputer 10.

21 is a photometering and distance measuring switch, and 22 is a release switch. Generally, the switches 21 and 22 are two-stage stroke switches, and are configured such that the switch 21 is turned on during the first stroke of the switch, and the switch 22 is turned on during the second stroke.

36 is a TTL film surface reflection dimming sensor connected to a dimming circuit 37, and the dimming circuit 37 is connected to a strobe unit 38.
connected to.

39 is a motor drive circuit for the zoom motor 4o of the strobe, and is connected to the microcomputer 10.

The strobe has a reflector 44. An absolute encoder 46 for detecting the zoom position of the strobe is connected to the microcomputer 10. For example, a Fresnel lens 45 for condensing light to form a zoom strobe is arranged in front of the strobe.

42 is a DC/DCC/type controller that charges the main capacitor in the strobe unit 38 and is connected to the battery 18;
Oscillation 0N10 according to instructions from microcomputer 10
FF is controlled. 43 is a known circuit for detecting the completion of charging, which connects the strobe unit 38 and the microcomputer 1o.
to mM.

49 is the miniature light bulb for pre-irradiation mentioned above, and its light is transmitted through lens 3.
The light is focused at 3.

The miniature light bulb 49 is connected in series with the transistor 47, and the base resistor 48 of the transistor is connected to the microcomputer 1.
Connected to 0.

The switch 32 that applies "L" to the microcomputer 10 is a switch for red-eye prevention operation, and when it is on, it becomes red-eye prevention mode, and when it is off, it becomes normal strobe mode. When the switch 31 is on, it becomes strobe mode, and when it is off, it becomes AE mode. This is a switch to switch to a remote mode.

23a to 23e are contact pins on the camera side, and are connected to mount 1.
It is placed near the mounting surface of a. 52a-52
e is the contact pin group on the lens side, and contact pin group 2 on the camera side.
3a: Contacts when 23e and both mounts la and 51a are combined.

Gl, G2. is an optical lens for photography.

53 is a lens G1 drive motor used for focus adjustment, and is connected to a lens drive circuit 57. motor 5
The number of pulses is manually input to the counter 54 by the rotation of 3.

5 and 8 are absolute encoders for detecting the absolute position of the lens G1, and the microcomputer 5
Connected to 5. G2 is a lens that controls focus change, so-called zooming, and as is well known, the lens G2 moves back and forth when operated by the photographer. The absolute encoder 59 detects the absolute position and is sent to the microcomputer 55.

Reference numeral 61 is an aperture drive circuit connected to the microcomputer 55 and to a known pulse motor 56. This motor 56 drives the aperture.

Next, the operation of the camera system of this embodiment having the above configuration will be explained.

First, turn on the main power switch 19 of the camera body 1.
DC by operating the C/DC converter 20
/DC converter 20 supplies the microcomputer 10 with a constant voltage that allows it to operate. When the photometry/distance measurement switch 21 is turned on by pressing the release button, the amount of light detected by the photometry light receiving element 6 is transferred to the photometry calculation circuit 7.
and stores the exposure amount using a known method.

On the other hand, the photometric distance measurement switch 21 also serves as a trigger switch for automatic distance measurement. Turn on the photometering switch 21
Then, the distance measurement sensor 16 is activated according to instructions from the microcomputer 10, and the distance measurement calculation circuit 17 performs distance measurement calculation using a known method, determines the amount of lens extension, and communicates with the microcomputer 55 on the lens side using a known serial communication method. , and instructs the lens drive circuit 57 to rotate the drive motor 53 to move the photographing optical system G1. At the same time, the counter 54 measures the movement of the lens using the ratchet 60, and the microcomputer 55 reads the number of pulses to detect the amount of movement of the lens. to move the photographing optical system G1 and stop the lens at the in-focus position.

Generally, the distance is measured again, and if it is determined that the object is in focus, the camera displays an in-focus indication or generates an in-focus sound.

Next, the operation of the strobe will be explained.

When the switch 31 is turned on, the flash mode is set. ZOOM information (focal length information) of the lens is transmitted to the camera side by the absolute encoder 59 through well-known serial communication between the lens microcomputer 55 and the camera side microcomputer 10, and the motor drive circuit 39 is operated according to instructions from the microcomputer 10. Then, the reflector 44 of the strobe is moved to match the angle of view of the lens with the irradiation angle of the strobe using a known method. Of course, there is no real harm in doing the above when the camera is not in strobe mode.

If there is no charge completion signal, the microcomputer 10 operates the DC/DCC/type controller 42 to charge the main capacitor in the strobe unit 38.

Next, when the release switch 22 is turned on (the release button is pressed to the second stroke), the microcomputer 10 drives the motor drive circuit 13 to rotate the mirror drive motor 12, and the mirror drive cam 11
By rotating the mirror 3 and pushing up the operating bin 3b, the mirror 3 is raised and held at that position.

After that, the microcomputer 10 of the camera 1 and the microcomputer 55 of the lens 50 connect the contact bin group 23a,
23b, 52a, and 52b, the aperture value corresponding to the amount of photometry is instructed to the lens (AE
(at the time of shooting). When shooting with a flash, the aperture value used for flash photography is instructed to the lens. The aperture setting value instructed by the camera is transferred to the pulse motor 56 by the aperture drive circuit 61.
The aperture is narrowed down to the specified aperture.

After a certain amount of time lag, the front curtain of the shutter 34 is moved to start exposure. After the shutter speed specified by the microcomputer 10, the rear curtain is run and the exposure is completed.

The strobe unit 38 emits light by a well-known X contact (not shown) at the time when the front curtain has completed traveling, and TTL light control is performed by the light reflected from the film surface by the dimming circuit 37, and when proper exposure is achieved, the strobe unit 38 emits light. stops emitting light.

The above is the normal strobe shooting operation with the switch 32 off. When the switch 32 is turned on, it is a red-eye prevention mode. At this time, the clamp 49 lights up after AF is completed, and the subsequent release sequence is It is not executed for a certain period of time after the lamp 49 is turned on, for example, 15 seconds until the pupil closes. In other words, manual operation of the switch 22 is prohibited, and the release sequence cannot be shifted.

When the rear curtain travel is completed and photographing is completed, the mirror drive motor 12 is energized to further rotate the mirror drive cam 11, thereby lowering the mirror 3 and returning to the photometry state.

At the same time, the step motor 56 is reversely rotated by the aperture drive circuit 61 to perform aperture return drive. Further, the mirror drive motor 12 also serves as a mechanical charge for the focal brain shutter 34.

Next, the microcomputer 10 issues an operation command to the motor drive circuit 15, and the film winding and rewinding motor 14 winds the film.

After that, the sequence returns to the original and returns to photometry and distance measurement.

Note that after winding, if a predetermined number of images have been taken, the known motor 14 is reversed to perform rewinding. This detection is performed by known means, such as by determining the number of film frames read from the DX code of the film cartridge or by determining the tension of the film.

Next, we will discuss the functions performed by microcomputers in the third section.
This will be explained using the flochute in Figures 9 to 9. In the following explanation or in the same figure, the photometry switch 21 is called SWI, the release switch 22 is called SW2, 5WBP (not shown) connected to the microcomputer 10 is a back cover switch, 5WREW is a rewind switch, SWFLM
1 and 2 respectively represent film actuation switches linked to film perforations.

Furthermore, the microcomputer 10 has various flags, and in the following explanation or in FIGS. is assumed to be closed. JFF represents a flag that stores the autofocus or in-focus state, REWF represents a flag that stores that only 1 rewind is required, FRAMER is a register that stores the film, and C0UNT represents the register that stores the film. It is a counter. EFF is a flag that stores the flash photography mode. REYF is a flag that stores the red-eye prevention operation.

When the main power switch 19 is turned on, the DC/DC converter 20 starts operating, and the microcomputer 1
Supply power to 0. The microcomputer 10 starts operating from the reset accordingly. Assume that the back cover is now open and all switches are turned off.

(It becomes AE operation).

[Step 1 Initialize coflags and registers.

[Step 2] Determine the back cover switch. Since it is open, go to Step 3.

[Step 3 Clear the number of cofilms.

[Step 4] Clear the back cover flag BPF.

[Step 5] Determine the rewind flag REWF, and since step 1 is cleared, proceed to step 6.

[Step 6 Determine remote. Switch 31 is OFF
Since it is F, proceed to step 7.

[Step 7] Set EFF to φ, that is, clear, and go to step 8.

[Step 8: Determine the red-eye prevention mode. Switch 32 is OFF, so go to step 9.

[Step 9] Set REYF to φ and step 10
fart.

[Step 10] Determine the photometry switch SWI. Since it is OFF, proceed to step 11.

[Step 11] If the lens is moving, stop it.

[Step 12 Clear the focus flag JFF.

[Step 13 If the lamp 49 is lit, turn it off. and a timer inside the microcomputer (not shown)
Reset.

[Step 14] Wait for the switch to change. When you insert the film and close the back cover, the back cover switch 5WBP
is entered and the process proceeds from step 14 to step 2.

Now that the back cover is closed, go to step 15.

[Step 15] Since it has been cleared in step 4, proceed to step 16. [Step 16] Set the BPF flag to 1.

[Step 17] Go to the film blank feed subroutine (described later).

From then on, steps 5 to 14 are the same as above,
In step 14, the switch enters a standby state.

By using the back cover flag in this way, it is possible to configure the system so that empty feeding is performed only once when the back cover is closed. Here S
When WI is pressed, go to step 2. The back cover is closed, so go to step 15.

Since it is PPP-1, go to step 18.

[Step 18 The rewind SW is currently off, so step 5
fart. After that, proceed to step 1o in the same manner as above.

[Step 10 Since you just pressed SWI, step 61
fart.

[Step 61] Since EFF is 0, step 6
Go to 2.

[Step 62 Komame lamp 49 is not lit, so
Go to step 19.

[Step 19: Measure the subject brightness and calculate the EV value.

[Step 20] Calculate the shutter aperture value from the EV value.

[Step 21 Call autofocus subroutine (described later).

[Step 22] Check the JFF flag, and if it is in focus, go to step 23; if not, go to step 2, and perform photometry and autofocus through steps 19, 20, and 21 as described above. If it is currently in focus, proceed to step 23.

[Step 23] Since REYF is φ, proceed to step 24. [Step 24] If SW2 is off, return to step 2 and repeat photometry and distance measurement. If SW2 is turned on at this point, step 25 (to the release sequence)
fart.

[Step 25] Since REYF=φ, proceed to step 26. [Step 26] Stop the lens being driven in the autofocus subroutine.

[Step 27 Electrify the commuter 12 and start mirror up.

[Step 28] The microcomputer 55 of the lens is caused to narrow down the aperture to the value determined in step 20 by known serial communication.

[Step 29] Wait for completion of mirror up started in step 27.

[Step 30 Stop the commuter 12.

[Step 31] Send the shutter light.

[Step 32] Wait for the shutter time calculated in calculation routine 20.

[Step 33] Start the shutter feed.

[Step 34] Perform serial communication to the microcomputer 55 of the lens to open the aperture.

C step 35] The motor 12 is energized to start mirror down and shutter charging.

[Step 36] Wait for shutter charge to be completed.

[Step 37] Apply the brake to the motor.

[Step 38 The film winding subroutine will be called and will be described later.] The film is wound one frame.

[Step 39] When the rewind flag is REWFhl, that is, when the film cannot be wound in the winding subroutine, the process branches to step #2. Then, in step 5, go to step 42 to perform rewinding.If the winding is now normal, go to step 40.

[Step 40] SW2 (release switch 22
) is turned off.

[Step 41 Clear the focus flag JFF and proceed to step 2.]

The above is the operation during AE photography without strobe mode. Next, the operation of the strobe motor will be explained. Assume that switch 31 is now on and switch 32 is off. In other words, it is assumed that the red-eye prevention mode is not in effect.

[Step 6] Determine the strobe mote. switch 3
1 or on, so go to step 43.

[Step 43] Set EFF to 1, and proceed to Step 8 [
Step 8] Since the switch 32 is off, go to step 9.

[Step 9] Set REYF to 0 and go to step 10 [
Step 10] Here, it is determined whether SWl is on or not, and if it is on, the process proceeds to step 61.

[Step 61] Since the EFF has been set in step 7, proceed to step 44.

[Step 44] Detect a charging completion signal. If not charged, proceed to step 45.

[Step 45: Turn on the DC/DC converter 42, and repeat steps 44 and 45 until charging is completed.

If charging is completed, proceed to step 46.

[Step 46] Turn off the DC/DC converter 42.

[Step 47] Since the lens is designed to send the focal length of the lens to the camera side as focal length information based on the absolute encoder 59, serial communication is performed here to the microcomputer 55 on the lens side to determine the focus of the lens. Call distance.

[Step 48] The position information of the strobe zoom is read by the absolute encoder 46. The camera microcomputer uses this information to preliminarily set the angle of view corresponding to the lens focal length.

[Step 49] Determine whether the focal length of the lens matches the focal length of the zoom strobe. If they do not match, go to step 50; if they match, go to step 51.

[Step 50] The motor 40 is energized to move the strobe reflector 44. Step 47, 4 until match
8, go around 49.50.

[Step 51] Lens focal length and strobe ZOO
Since the focal lengths of M match, the motor 40 is stopped.

In this way, it is possible to match the illumination angle of the strobe corresponding to the angle of view of the focal length of the lens.

The sequence proceeds in the same way as in AE photography, but only the parts that are different from AE photography will be explained.

[Step 20] The TV and AV values are determined, but unlike those for AE photography, they are set to the TV and AV values used for strobe photography.

[Step 3! ]When the first shutter is completed, X (not shown)
When the contact is closed, the strobe emits light and the sensor 36 and dimming circuit 3
7, the dimming operation of the parallel dimming strobe is completed in a short time as is well known. (It is not directly related to software, but is executed by hardware, and in this way, general strobe photography is executed.) Next, we will discuss strobe photography in red-eye prevention mode.

It should be noted that operations common to those during AE and strobe normal photography described above will not be explained repeatedly.

When the switch 32 is turned on, the red-eye prevention mode is activated.

[Step 8] Switch 32 is on, so step 52
[Step 52] If strobe mode is not set in step 43, red-eye prevention mode is not set either, and the process goes to step 9. Since the current EFF-1 is set, the process goes to step 53.

[Step 53] Set REYF-1 and proceed to Step 10
If the switch SWI is pressed, the process goes to step 61. The following step 23 is the same as in the strobe normal mode, so it will be omitted.

[Step 23] Since REYF=1, step #6
Go to 4.

[Step 64] Add α corresponding to the focal length obtained in Step 47 to 2.5 m. α is determined for each focal length, for example, as described above.

[Step 54 The object distance is read to the lens microcomputer 55 by known serial communication. Note that, although not mentioned in the flowchart, the lens microcomputer 55 is configured to read the position of the lens G1 with an absolute encoder 58 and output distance information corresponding to the position.

[Step 55 As mentioned above, for example, zoom position 35
If it is 5m equivalent to a millimeter lens (d = 2.5m + 2.
5 m - 5 m), if it is less than 5 m, go to step 63, set REYF=φ, and go to step 24; if it is more than 5 m, go to step 56 [Step 56] Turn on the red-eye prevention lamp.

[Step 57 Start the co-timer and start timing [Step 24] If SW2 is off, return to step 2, and proceed to step #62 as described above. Step #6
2, if the lamp is lit, photometry is performed in steps 19 and 20, the autofocus in step 21 is jumped, and the process proceeds to step '22.

[Step 22] Once in focus, go to step 23, RE
Since V=1, step 5455.56.5 again
Go to 7. Note that since the timer has already started in step 57, the timer continues counting.

[Step 24] If SW2 is on, go to step 25 [
Step 25] Since it is REYF-1, go to step 58 [
Step 58] It is determined whether or not the above-mentioned timer has elapsed for 1.5 seconds or more. If the timer has not elapsed, the process proceeds to step 24; otherwise, the process proceeds to step 59.

[Step 59] Turn off the lamp and go to step 26.
This is omitted as it is the same as normal strophone shooting.

Next, the rewinding operation will be explained.

Note that when the film rewind switch 5WREW is turned on, the process branches from step 18 to step 60, and REWE is set to 1.

[Step 5] Since REWF=1, step 4
The 20 rewind subroutine is called and rewinding is performed.

The subroutine block will be explained below with reference to FIG.

[Step 81] Accumulation is performed in the distance measuring sensor 16.

[Step 82] The value read from the ranging sensor 16 is calculated to determine defocus.

[Step 83: Determine whether the subject is within the focus range. If the subject is in focus, proceed to step 86; otherwise, proceed to step 84.

[Step 84] The lens is driven to the in-focus position.

[Step 85: If in focus, set 1 to focus flag JFF.

FIG. 8 is a flowchart of the winding subroutine.

[Step 110] Number of films read by a DX code reading circuit (not shown) and film number register FRA
Compare the MER values, and if they are equal, proceed to step 123.

[Step 111] The film winding motor 14 is rotated forward and film winding is started. U step 112 Counter register [:01JNT is cleared.

[Step 113] Set the film bow length timer to 40
0m5 setting.

[Step 1141 When the timer has finished counting, go to step 123.

[Step 115] If the film operating switch SWFLM is on, return to step 114; if off, go to step 1
Proceed to step 16.

Therefore, if the film is being wound and the film operating switch is on or off, the process goes to 116. On the other hand, if the film is not wound up by tension and the film operating switch is on for 400 m5, the process proceeds to step 123.

[Step 1161 Set the film bow length timer to 40
0m5 setting.

[Step 1171 When the timer completes counting, go to step]23.

[Step 118] If the film actuation switch SWFLM is off, return to step 1171\; if off, proceed to step 119.

Similar to steps 113 to 115, it is detected that the film operation switch SWFLM is turned on from off.

[Step 119] Set count register C0tlNT to 1
increase.

[Step 1201 count register C0IINT is 8
If so, the process returns to step 121; if it is less than 8, the process returns to step 113. That is, if the film operating switch 5WFLM is turned on and off eight times from steps 111 to 120, the process proceeds to step 121.

[Step 121] Since the film has been wound, the brake is applied to the film winding motor 14.

[Step 122] Film number register FRAMER
Increase by 1.

When the film is stretched midway or the number of films reaches the number of films determined by DX, the process moves to step 123.

[Step 123] Brake the film winding motor 14.

[Step 1241 Set the rewind flag REWF to 1 and return. Therefore, in step 5, the rewind flag RE
When W appears, rewind.

FIG. 7 is a flowchart for feeding from film [Steps 125, 125, and 127] The film winding subroutine is called three times.

Send from 3 pieces.

[Step 128] Film number register FRAMER
Set the first image to .

FIG. 9 is a flowchart of the film rewind subroutine.

[Step 130] The motor 14 is reversed to start rewinding.

[Step 131] Set 400m5 on the timer [
Step 132] When the timer has completed counting 400m5, proceed to step 137.

[Step 133] Film operation switch S W F
Steps 132 and 133 are repeatedly executed while LM is off.

[Step 134] Set 400m5 on the timer [
Step 135] When the timer has completed counting 400m5, proceed to step 137. , [Step 136] Steps 135 and 136 are repeatedly executed while the film operation switch SWFLM is off. In other words, while the film is being rewound, the film operation switch is on and off, so steps 131 to 1
Execute 36 loops repeatedly. When the film is completely rewound, the film operation switch SWFLM is no longer switched, so the 400m5 timer finishes counting and the process branches to step 137.

[Step 137] Since rewinding is complete, brake the motor 14.

[Step 138] Clear the rewind flag REWF [Step 1391 Continue executing 139 repeatedly until the back cover is opened.

The present invention is not limited to the above embodiments, but can be implemented in various forms. For example, although a miniature lamp is used in the illustrated embodiment, it goes without saying that a strobe light or an LED may be used for pre-irradiation.

Further, although the irradiation angle of the lamp is fixed in this embodiment, it may have a zoom effect like a strobe. or,
It goes without saying that it may be integrated into the reflector 44 of the strobe and used for the zoom of the strobe by using the Fresnel convex lens 45. In this embodiment, a zoom and a zoom strobe are combined, but there is no problem in applying the invention to a single focus lens and a strobe with a single illumination angle. Of course, the strobe is not a dimmable strobe, but can also be a manual flash.

[Effects of the Invention] As detailed above, according to the present invention, in order to prevent red eyes, the distance at which the pre-irradiation is performed to close the pupils is corrected by the lens judgment means. In addition, the prohibited distance at which pre-irradiation is not performed to miss a photo opportunity is adjusted to the maximum allowable value, so pre-irradiation is performed only when necessary, eliminating wasted power and no need to wait for red-eye countermeasure time. It is possible to get a camera that is strong for photo opportunities.

[Brief explanation of drawings]

Fig. 1 is a schematic side view for explaining the reason why the red eye phenomenon occurs, Fig. 2 is a schematic configuration diagram of a camera and lens showing an embodiment of the present invention, and Figs. 3 to 9 are a diagram of the present embodiment. FIG. 2 is a flowchart showing the operation of FIG. 1... Camera 44... Strobe light emitting unit 49
... Mini lamp for red eye prevention 50 ... Lens and 4 other people Fig.

Claims (1)

[Claims] 1. A camera that performs pre-irradiation prior to release to close the pupils of the subject's eyes to suppress the occurrence of red-eye phenomenon during strobe photography at the time of release, the camera comprising: A red-eye prevention camera comprising a lens determining means for determining the type of lens, and a distance at which pre-irradiation is performed at a distance where red eye occurs is corrected by the lens determining means based on focal length information of the lens. 2. A red-eye prevention camera according to claim 1, wherein when the lens determining means determines that the lens is a wide-angle lens, the distance at which the pre-irradiation is performed is corrected to be larger, and when the lens is determined to be a telephoto lens, the distance at which the pre-irradiation is performed is corrected to be smaller. .