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FL of Cameras and Viewers.
- From: P3D Gabriel Jacob <jacob@xxxxxxxxxxxxxx>
- Subject: FL of Cameras and Viewers.
- Date: Wed, 11 Dec 1996 23:04:58 -0500
Here was an interesting table I found in Handbook Of Photography by
Henny and Dudley, comparing focal lenghts of viewers in regard to
cameras.
DISTORTIONS AND ABERRATIONS IN STEREOPHOTOGRAPHY
________ ________________________________________________________________
| |____________________________Effect on___________________________|
| | Shape of image |Size of image |Distance of |
|Cause |_____________________________|______________|image from eyes____|
| |Unchanged|Decreased|Increased|Smaller|Larger|Decreased|Increased|
| | |in depth |in depth | | | | |
|________|_________|_________|_________|_______|______|_________|_________|
|Fs>Fc | | | X | | | | X |
|Fs<Fc | | X | | | | X | |
|Ds>Fs | | | X | | | | X |
|Ds<Fs | | X | | | | X | |
|Ms>Mc | | | X | | | | X |
|Ms<Mc | | X | | | | X | |
|i<Bc | X | | | X | | X | |
|i>Bc | X | | | | X | | X |
|i<Bs | X | | | X | | X | |
|i>Bs | X | | | | X | | X |
|Prints r| | | X | | | | X |
|Prints e| | X | | | | X | |
|________|_________|_________|_________|_______|______|_________|_________|
Subscripts: s refers to stereoscope; c refers to camera.
F=focal length;
D=distance of plate from lenses;
M=magnification of lenses;
B=distance between optical centers of lenses;
i=interocular distance.
r=reduced
e=enlarged
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