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Re: [OM] shift vs shift/tilt

Subject: Re: [OM] shift vs shift/tilt
From: "John A. Lind" <jlind@xxxxxxxxxxxx>
Date: Sun, 02 Dec 2001 10:38:35 +0000
At 15:05 12/2/01, Alan asked:

What exactly are the advantages of a shift lens vs shift/tilt lens? The
zuiko 24 shift is suppose to be very good. The canon is suppose to be
reasonable (but all reports I've read indicate it is optically inferior
to the zuiko). On the other hand it also supports a tilt mechanism
(which I think the zuiko lacks).

Alan

The tilt allows variation of the critical focus distance across the film plane. A traditional landscape with very, very close foreground and very, very distant background is a classic example for using it. By tilting the lens down (or by tilting the back up; it's all relative), the bottom part of the image will have a closer critical focus distance than the upper part of the image.

Nearly all primes are focused at some distance closer than infinity by moving the lens farther from the film plane. Remember that images are inverted and reversed on the film in the camera(top of image is on bottom of film in camera, and left/right are reversed). The greater the tilt, the greater the difference.

This is one of the things a large format technical view camera can do that almost none of the MF and 35mm small format systems can. AFIK, Can*n's tilt lenses are the only ones that allow this in 35mm work.

-- John


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