JP3450480B2 - Pseudo telephoto camera - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pseudo-telephoto camera which can obtain a telephoto effect print at a low cost by using a panoramic photograph printing system.

[0002]

2. Description of the Related Art Recently, a camera capable of switching between standard shooting and panoramic shooting has become popular, and in response to this, the current laboratory system uses standard shooting frames and panoramic shooting frames as a mixed film. A standard size print (so-called service size) and a panorama size print are automatically printed after discrimination. The service size and the panorama size are about 1: 2 (area ratio 1: 4) when the shooting magnification (enlargement magnification) is simply compared, and the panorama size has a telescopic effect about twice as large as the service size. There is. That is, even if the image is taken with a taking lens having the same focal length, the panorama size has the same telephoto effect as that of a photograph taken with a lens having a focal length that is about twice the focal length of the lens taking the service size. Since the panorama size can be automatically printed from a mixed film, the price per sheet is currently 100 yen or less, and it is expected that the price will further decrease in the future.

On the other hand, the trimming in which a normal photographing negative is partially enlarged and printed is expensive because the printing must be done manually by an operator, and for example, a quarter area of a standard negative is trimmed. Then, if it is printed into a service size, the cost per sheet is around 500 yen. It is unlikely that this cost will rise and fall in the future.

[0004]

OBJECTS OF THE INVENTION It is an object of the present invention to obtain a camera which can obtain a print with a telephoto effect at a lower cost at a low cost by utilizing an inexpensive panoramic size automatic printing in a current laboratory system.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a panoramic size has a vertical length which is almost the same as a service size and a horizontal width which is about twice the panoramic size. It has the same effect as printing to twice the service size. Therefore, if you shoot only one frame in the center of the panorama size, print it as a panorama size, and cut the left and right sides It was completed with a focus on the ability to print one sheet with an effect.

Namely, the pseudo telephoto camera of the present invention, for example, in the center of the area shielded the upper and lower horizontal standard picture frame of 35mm film, a pseudo-telephoto frame is about half of the left and right length of the effective area is the standard picture frame It is characterized in that a pseudo telephoto frame is provided with means for photographing, and the pseudo-telephoto frame is formed by means for imprinting the cutting guide part on the left and right parts of the panorama area which shields the upper and lower sides of the standard frame.

[0007] The pseudo telephoto camera, the center of the area shielded the upper and lower horizontal standard picture frame of the film, comprising means effective area to shoot pseudo telephoto frame is about half of the left and right length of the standard picture frame, The pseudo-telephoto shooting frame is formed by forming regions of low exposure from the central portion on the left and right of a panoramic region that shields the upper and lower sides of the standard shooting frame, and the low exposure region can be formed by an ND filter.

[0008] For the film, it is preferable to provide a means for selecting photographing and the standard picture frame and the pseudo telephoto photographing frame.

[0009]

[0010]

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to illustrated embodiments. 1 and 2 are views showing the basic idea of the present invention.
For simplification of explanation, as shown in FIG. 1, the size of the standard photographing frame (negative) s and the size of the print S thereof are the same. The present invention, as shown in FIG.
In a panoramic shooting state in which about 1/4 of each of the upper and lower sides of the standard shooting frame is shielded from light, one pseudo-telephoto shooting frame t having a left-right length that is approximately half the left-right length of the standard shooting frame is shot in the center of the panorama size. After printing in panorama size,
Both sides are cut to form a print T. Figure 1,
As is apparent from FIG. 2, the print T has an effect of increasing the length by 2 times and the area by 4 times as compared with the standard print S (2
There is a double telephoto effect). That is, even when the standard shooting frame s and the pseudo-telephoto shooting frame t are shot by the lens having the same focal length, the shooting focal length of the print T seems to be about twice as long as the shooting focal length of the standard print S. . Therefore, the print T is called a pseudo telephoto print. The present invention is characterized in that such a pseudo-telephoto print T can be obtained simply by printing it as a panoramic photograph and cutting both sides without using special trimming. That is, the present invention is based on the premise that the negative including the pseudo telephoto frame t shown in FIG. 2 is recognized as a panoramic photograph in the laboratory and is used as a panoramic print.

3 and 4 show an embodiment of a mask for obtaining such a pseudo telephoto frame. It is considered that the printing machine of the laboratory recognizes as a panoramic image frame when a certain width above and below the standard image frame is shielded from light. FIG. 3 shows an embodiment in which projections 11p for cutting guidelines are provided on the upper and lower light-shielding masks 11 which shield the panoramic opening 11a by shielding a fixed width above and below the standard aperture. FIG. 4 shows a mask 12 overlaid on a standard aperture, with a light-shielding portion 12 above and below.
a and the left and right ND filter portions 12b are provided, and the pseudo telephoto shooting opening 12c is formed between the ND filter portions 12b. The density of the ND filter portion 12b is relatively thin so that a large error does not occur in automatic exposure in the laboratory, that is, the boundary between the ND filter portion 12b and the pseudo telephoto shooting opening 12c can be properly recognized, and the transmitted light amount is as large as possible. It is good to choose one. When the laboratory system recognizes a frame photographed using the mask 12 in which the ND filter portion 12b is also completely shaded and recognizes it as a panoramic photographed frame for panoramic printing, a mask in which the ND filter portion 12b is completely shaded is used. Can be used.

As shown in FIG. 5, the print photographed with the light-shielding mask 11 placed in front of the standard aperture and printed as a panoramic photograph is shown in FIG. P
S is imprinted. Therefore, if the panoramic print PP is cut along the cutting guide PS, the pseudo-telephoto print T can be obtained. Similarly, mask 1 before the standard aperture.
As shown in FIG. 6, the low-exposure portion UE formed by the ND filter portion 12b is imprinted on the left and right sides of the center of the panoramic print PP in the print photographed with 2 placed thereon and printed as a panoramic photograph. Therefore, the pseudo telephoto print T can be obtained by cutting the low exposure portion UD.

In the case of the camera for exclusive use of the pseudo-telephoto, these masks 11 and 12 may be fixedly provided instead of the standard aperture. On the other hand, in the case of a camera for both pseudo telephoto shooting and standard shooting, these masks 1 are placed before the standard aperture.
1 and 12 are moved forward and backward.

In the case of a camera for exclusive use of pseudo-telephoto, the finder is a fixed finder whose viewfinder field is the range captured by the pseudo-telephoto shooting frame. In the case of a dual-purpose camera,
As shown in FIG. 5, the pseudo telephoto frame 21 is drawn in the standard viewfinder field 20, or the close-up lens that narrows the field of view when inserted into the viewfinder optical system according to the pseudo telephoto frame is moved forward and backward. . Such a finder is well known, for example, in a two-focus switching camera.

[0016]

According to the present invention, a pseudo-telephoto print can be obtained at low cost by utilizing a panoramic size printing system. Also, if the dual-purpose camera is used, it is possible to perform shooting in which pseudo telephoto and standard are mixed. Therefore, it is possible to obtain an effect as if the focal length of the taking lens were doubled.

[Brief description of drawings]

FIG. 1 is a diagram schematically illustrating a magnification of 1 for printing from a normal standard shooting frame negative to a service size print.

FIG. 2 is a diagram schematically illustrating a panorama image frame negative in pseudo telephoto shooting and a magnification in printing on a panoramic size print as 2 in the present invention.

FIG. 3 is a front view showing an example of a mask used in the pseudo telephoto camera of the present invention.

FIG. 4 is a front view showing another example of a mask used in the pseudo telephoto camera of the present invention.

5 is an explanatory diagram for obtaining a pseudo-telephoto print from a print photographed using the mask of FIG. 3 and printed as a panoramic print.

FIG. 6 is an explanatory diagram for obtaining a pseudo telephoto print from a print photographed using the mask shown in FIG. 4 and printed as a panoramic print.

FIG. 7 is a front view showing an example of a finder used in the pseudo telephoto camera of the present invention.

[Explanation of symbols]

t Pseudo telephoto frame T pseudo telephoto print 11 Shading mask 11a Panoramic opening Protrusion for 11p cutting guideline 12 masks 12a light shielding part 12b ND filter part 12c Pseudo telephoto shooting aperture

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-6-337469 (JP, A) JP-A-62-103627 (JP, A) JP-A-7-140540 (JP, A) JP-A-5- 100308 (JP, A) JP-A-5-232606 (JP, A) Actual development 3-96646 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03B 17/00 G03B 17 / 24-17/34 G03B 17/38-17/46

Claims (3)

(57) [Claims] 1. A means for photographing a pseudo-telephoto frame having an effective area which is about half of the left-right length of the standard photographing frame, is provided at the center of a region where the upper and lower sides of a horizontally long standard photographing frame of the film are shielded from light. The pseudo telephoto camera, wherein the frame is formed by means for imprinting a cutting guide part on the left and right parts of a panoramic area that shields the upper and lower sides of the standard photographing frame. 2. A means for photographing a pseudo-telephoto frame whose effective area is about half the left-right length of the standard photographing frame is provided at the center of a region of the film which is horizontally long and is shielded from light, and the pseudo-telephoto photographing is provided. The frame is formed by forming regions of low exposure from the center on the left and right of a panoramic region that shields the upper and lower sides of the standard photographing frame, and the region of low exposure is formed by an ND filter. camera. 3. A pseudo telephoto camera according to claim 1, further comprising means for selectively photographing the standard photographing frame and the pseudo telephoto photographing frame on the film.