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Re: [OM] Distortion in 35/2.8?

Subject: Re: [OM] Distortion in 35/2.8?
From: "Doug Nowlin" <wa5ohb@xxxxxxxxxxxxx>
Date: Tue, 20 Jan 1998 22:51:18 -0600
Shaw wrote,


I just printed an 8x10 shot with my Zuiko 35/2.8 (single coated), with an
old
church near the centre, and three old lamp posts, one near the centre, and
one
near each edge of the frame. Upon printing, I noticed the outer lamp posts
are
leaning inwards toward the centre of the frame.

Since I don't recall them being this way, I must assume this is distortion
in
the lens, although I don't recall exactly the name for this effect.

Is this typical of the 35/2.8, and if so, are there Zuikos in the 24-35
range
which are better at controlling this effect?

I'm afraid the shot is ruined, as is a vertical of the same church. At least
with the vertical, I expected a problem, since I don't have a shift lens.
The
horizontal shot came as a surprise to me.

If this is pincushion distortion (lines curve inward in center), it is a
lens problem. Perspective distortion (line are straight, but lean) comes
from tilting the camera, and will happen with any lens. Get a level or a
shift lens. Incidentally, perspective distortion can be induced or corrected
in the darkroom by tilting the enlarger.

Doug


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