JP2883993B2 - View camera - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a view camera, and more particularly to a view camera with improved tilting.

2. Description of the Related Art Conventionally, a lens frame and a film frame are slidably and fixedly guided by rails, and the lens frame and the film frame are moved relative to each other, while the optical axis of the lens is in the center of the film surface. There is known a view camera capable of performing a so-called tilting which breaks a condition of being orthogonal to the camera.

Here, there are rise / fall, shift, swing, and tilt in the tilt of the view camera. Rise fall is to move the film plane perpendicular to the optical axis of the lens when the optical axis is substantially horizontal. The shift is to move the film plane horizontally with respect to the optical axis of the lens. Swing is to rotate the film plane about a vertical axis. Tilt is to rotate the film plane about a horizontal axis.

On the other hand, the view camera is a so-called yaw-f
ree) enables efficient shooting. That is, in the downward restraint shooting, which is shooting in a direction other than the horizontal direction by the view camera, for example, in the overhead view shooting, after focusing, while maintaining the in-focus state of one point of the film, the rotation axis of the film is made vertical, thereby making the film Even if the camera is rotated about this vertical axis and swings, the photographed image shown in FIG. 6 is not twisted as shown in FIG. 7 and maintains the focus on a specific vertical line of the imaging plane. That is, swing-you-free operation can be performed.

Further, after focusing, while maintaining the focus state of one point of the film, the horizontal rotation axis of the film is set to be perpendicular to the vertical plane including the optical axis of the taking lens, thereby shifting the film to the horizontal axis. Even if the tilt is performed around the center, the captured image is not twisted and the focus on the specific horizontal line of the imaging plane is maintained, that is, tilt / you-free operation can be realized.

Next, the conventional swing-yo free view camera
This will be described with reference to the drawings. The base rail 101 is
Support 1 slidably and fixedly mounted by 20, 122
30, 132 are attached. The supports 130 and 132 have
Posts 134 and 136 are attached so as to be rotatable and fixable about tilt canes 124 and 126.

At the upper ends of the columns 134 and 136, a lens frame member 102 for holding the lens 106 and a film frame member 1 for holding the film are provided.
04 is attached via arcuate rails 110 and 111.

In such a configuration, first, the base rail 101,
The columns 134, 136, and the lens frame member 102 and the film member 104 are tilted and tilted, and the supports 130, 132
Is focused on by sliding with respect to the base rail 101. Next, loosen the tilt pads 124, 126, and
Make 36 parallel to the subject. By doing so, the rotation axes of the lens frame member 102 and the film frame member 104 become parallel to the subject, so that the photographed image is not twisted even when the lens frame member 102 is swung, and the film frame member 104 is swung. Even if the film frame member is not twisted, iodine free is established.

(Problems to be Solved by the Invention) The above-mentioned swing-you-free view camera has a problem that the operation for swing-you-free is extremely complicated. That is, after the initial focusing, if the tilting limbs 124 and 126 are loosened so that the columns 134 and 136 are parallel to the subject, the rotation center axes of the columns 134 and 136 are below the base rail 101. The focus was lost and I had to focus again.

Further, when tilting is performed by swinging the columns 134 and 136 during this focusing, the lens frame member 102 and the film frame member 1 are tilted.
The rotation axis of 04 is no longer parallel to the subject, and the rotation axes of the lens frame member 102 and the film frame member 104 must be adjusted again to be parallel to the subject. Therefore, in the conventional swing-you-free view camera, fine adjustments have to be repeatedly performed in order to focus and make the swing-you-free.

In addition, conventional swing-you-free view camera,
As in the prior art, the number of parts is large, the manufacturing cost is high, and the weight is not preferable.

Furthermore, the view camera has to perform the sliding pivotal movement of each part including the frame member with high precision, but there is a problem that the sliding by the arc-shaped rail is extremely difficult to manufacture and the high manufacturing cost cannot be avoided. .

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem of a conventional view camera, and an object of the present invention is to provide a small-sized, high-precision, easy-to-operate swing and tilt-free view camera.

Another object of the present invention is to provide a view camera having a simple structure and low manufacturing cost.

(Constitution of the Invention) According to the present invention, an L-shaped first frame member composed of a first side and a second side, a rail for guiding and fixing the first side, and the first side A first pivot portion for pivotally fixing the rail, a second frame member disposed inside the first frame member in an L-shape including a third side portion and a fourth side portion, A second pivot portion that pivotally couples the second side portion and the third side portion and a third pivot portion that has the same rotation axis as the first pivot portion inside the second frame member. A film frame pivotally fixed to the four sides, a photographing lens guided and fixed to the rail with a fixed positional relationship to the rail, and a dark box connected to the photographing lens and the film frame. And an axis of the first pivot, the second pivot, and the third pivot passes through the film surface. Is provided.

(Example) Hereinafter, a view camera according to an example of the present invention will be described with reference to the drawings. The view camera includes a lens frame member 2 and a film frame member 4 on a rail 1 as shown in FIGS.
Is slidably and rotatably mounted. The lens frame member 2 is
A lens (not shown) having a shutter, an aperture, and a photographing lens is supported, and the film frame member 4 supports a film holder 40. The lens plate and the film frame member 4 are connected by a bellows to form a dark box.

The film frame member 4 has a sliding portion 6 attached to the rail 1,
The first frame member 12 is attached to the sliding portion 6 via the first pivot portion 70, and the film holder 40 is attached to the first frame member 12 via the second frame member 14.

The sliding part 6 has a drive brace 8 and a fastening brace 10, and slides on the rail 1 by loosening the brace 10 and rotating the drive brace 8, thereby tightening the brace 10. It is fixed to the rail 1.

The first pivoting portion 70 has a base 22, a lock tab 62, and a slide receiving portion 72. The first pivoting portion 70 is formed by loosening the lock tab 62 so that the slide receiving portion 72 is pivoted around the vertical axis V.
The slide receiving portion 62 is rotatable on the base 22, and the slide receiving portion 62 is fixed to the base 22 by tightening the lock tab 62.

The first pivoting portion 70 has a clamping hook 24 and a driving hook 26 for moving and fixing the first side portion 18 described in detail below. The first side 18 is moved relative to the drive receiving portion 72 by loosening the clamp 24 and rotating the drive 26, and by tightening the clamp 24, the first side 18 is pivoted. Fixed to 72.

The first pivot member 12 includes a first side portion 18 and a second side portion 16, and the first side portion 18 and the first side portion 16 are, as shown in FIG.
Usually, they are fixed to each other at right angles, but by loosening the tightening handle 20, an angle of 90 ° or more can be formed.

The second side 16 includes a base 30, a moving member 28 slidably mounted on the base 30, a drive arm 35, and a fastening arm 32. Then, by loosening the clamp 32 and rotating the drive 35, the moving member 28 moves with respect to the base 30 so that the second side portion 16 expands and contracts, while tightening the clamp 32. As a result, the length of the second side portion 16 is fixed.

The second frame member 14 has a third side 34 and a fourth side 36 which are fixed at substantially right angles. The upper end of the second side 16 and the upper end of the third side 34 are supported by a second pivot 74 so as to be fixable.

The second pivot portion 74 includes a shaft member (not shown) that supports the upper end of the second side 16 and the upper end of the third side 34, and a second side 16.
And a tightening handle 38 attached to the upper end of the third side 34, and a brake member for pressing the disk 76 between the third side 34 when the tightening handle 38 is tightened. 78. By loosening the tightening handle 38, the second frame member 14 can be rotated about the horizontal axis H with respect to the first frame member 12, that is, can be tilted.
By tightening, the second frame member 14 is fixed to the first frame member 12.

In the vicinity of the connecting portion between the third side portion 34 and the fourth side portion 36 of the second frame member 15, a driving member 60 for adjusting the height of the fourth side portion 36 with respect to the third side portion 34 is provided. I have. By rotating the driving hook 60, the film 44 on the rotation axis of the second pivot 74 is rotated.
The upper passing position can be changed.

At the top of the third side 34, a level 39 is attached. The level 39 is one in which two rod-shaped bubble tubes are arranged orthogonally, or a circular bubble tube.

The fourth side portion 36 is connected to the film holder via the third pivot portion 80.
Support 40. The third pivot portion 80 has a shaft member 402 that supports the film holder 40 so as to be rotatable about the vertical axis V with respect to the fourth side portion 36, and a clamp 42. The vertical axis V passing through the film holder 40 by loosening the clamp 42
The rotation around the center, that is, the swing becomes possible, and the film holder 40 becomes the fourth
Fixed to side 36. The film holder 40 can be detached from the fourth side 36 by loosening the film frame mounting screw 400, and the screen size can be changed.

Next, a description will be given of a method of capturing an image with a view free using the view camera having the above configuration. First, a desired subject is focused with a desired composition by performing the following operations in any combination. Although only the film frame member 4 is described here, the same adjustment can be made for the lens frame member 2.

(1) Adjusting the position of the first pivoting portion 70 with respect to the rail 1 by loosening the fastening tab 10 and rotating the driving tab 8.

(2) The swing adjustment is performed by loosening the lock tab 62 and rotating the film 44 about the vertical axis V in the direction of the first side portion 18.

(3) The position of the first side portion 18 with respect to the first pivot portion 70 is adjusted by loosening the tightening tab 24 and rotating the driving tab 26 to perform shift adjustment.

(4) Loosen the tightening handle 20 and adjust the angle between the first side 18 and the second side.

(5) The second side 16 is expanded and contracted by loosening the fastening tab 32 and rotating the driving tab 35, thereby adjusting the height of the second frame member 14 with respect to the first frame member 12, ie, rise / fall adjustment. I do.

(6) Loosen the fastening handle 38, rotate the second frame member 14 about the horizontal axis H, and perform tilt adjustment.

(7) By rotating the drive knob 60, the fourth side
The height of 36 is adjusted, and the positional relationship between the horizontal rotation axis H and the film 44 is adjusted.

(8) Loosen the clamp 42 and rotate the film holder 40 about the vertical axis V with respect to the fourth side 36 to perform swing adjustment.

After the focusing on the desired subject is completed by the above-described adjustment, first, the tilt / you-free adjustment is performed. That is,
Loosen 62 so that the horizontal axis H of film 44 is perpendicular to the vertical plane containing the optical axis (not shown) of the taking lens. When the tilt / you-free operation is adjusted as described above, even if the tightening handle 38 is loosened and the tilt is adjusted further, the focus is not lost and the photographed image is not twisted.

Next, a swing-you-free adjustment is performed. That is,
Loosen the handle 38 and refer to the level 39 to check the film 44
Is set so that V is vertical. When the swing yaw free is adjusted in this way, loosen the fastening tab 42,
Further, even if the swing adjustment is performed, the focus is not lost and the captured image is not twisted.

The above-described tilt-you-free adjustment and swing-you-free adjustment may be performed for one shot or may be performed for either one depending on the nature of the subject and the photographing intention.

Next, another embodiment of the base rail, that is, a telescopic base rail will be described. The telescopic base rail 200 has a lower rail 202 and a slidably mounted 2
And a book upper rail 204. The lower rail 202 has a fastening screw 206 screwed near both ends, and the fastening screw 206
By rotating the lock handle 208 provided on the
Tightening screws 206 can be moved in and out of lower rail 202.

The upper part of the tightening screw 206 is a tightening member 2
10 are supported. On the other hand, the upper rail 20 has a dovetail groove 214 on its lower side in which the fastening member 210 can slide.

In the above configuration, loosen the lock handle 208,
By adjusting the position of the upper rail 204 with respect to the lower rail 202 to form a base rail of a desired length, the lock handle 208
Tighten.

(Effects of the Invention) The conventional yaw-free operation in a view camera requires a high degree of skill, but according to the present invention, a simple yaw-free operation after a single focus allows the tilt to be maintained without breaking the in-focus state. Yaw-free and swing-you-free can be easily realized, and even non-experts can efficiently shoot.

Further, according to the present invention, it is possible to constitute a swing-free and tilt-free view camera with good operability, and there is an advantage that its manufacturing cost is low.

[Brief description of the drawings]

FIG. 1 is a rear view of a view camera according to an embodiment of the present invention, and FIG.
FIG. 3 is a perspective view, FIG. 3 is a side view of another embodiment of the base rail, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a side view of a conventional view camera, FIG. 6 is a diagram showing a normal photographed image, and FIG. 7 is a diagram showing a twisted photographed image. DESCRIPTION OF SYMBOLS 1 ... Base rail 2 ... Lens frame member 4 ... Film frame member 6 ... Sliding part 8 ... Drive screw 10 ... Tightening screw 12 ... First frame member 14 ... Second frame member 16 ... … Second side 18… First side 20… Tightening handle 34… Third side 36… Fourth side 40… Film holder 50… Rubber bellow 62… Lock nose 70… 1 pivot 74 2nd pivot 80 3rd pivot

Claims (7)

(57) [Claims] 1. An L-shaped first member comprising a first side portion and a second side portion.
A frame member, a rail for guiding and fixing the first side portion, a first pivot portion for pivotally fixing the first side portion and the rail, a third side portion and a fourth side portion. A second frame member disposed inside the first frame member in an L-shape, a second pivot portion for pivotally fixing the second side portion and the third side portion, and a second frame member A film frame fixedly attached to the fourth side by a third pivot portion having the same rotation axis as the first pivot portion on the inner side of the first frame; A first, second, and third pivoting part including a photographing lens that is guided and fixed, and a telescopic member that is connected to the photographing lens and the film frame to form a dark box. A view camera, wherein the axis of passes through the film surface. 2. The camera according to claim 1, wherein the photographing lens includes the first frame member and the second frame member.
The view camera according to claim 1, wherein the rail is guided and fixed by the rail through the same configuration as the frame member, the first pivot portion, the second pivot portion, and the third pivot portion. 3. The view camera according to claim 1, wherein said first side portion is extendable. 4. The view camera according to claim 1, wherein an angle formed by the first side and the second side is variable. 5. The view camera according to claim 1, wherein said second frame member has a level. 6. The view camera according to claim 1, wherein the second frame member is movable in a direction in which a fourth side portion is perpendicular to a length direction of the fourth side portion with respect to the third side portion. . 7. The view camera according to claim 1, wherein said fourth side portion is detachable from said film frame member.