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Re: [OM] Distortion in 35/2.8?

Subject: Re: [OM] Distortion in 35/2.8?
From: "Jim Terazawa" <jimt@xxxxxxxxxxxxxx>
Date: Tue, 20 Jan 1998 13:36:44 -0600 (CST)
Cc: jimt@xxxxxxxxxxxxxx (Jim Terazawa)
> 
> 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.
>

I believe it is called " barrel distortion " where vertical image near 
right/left
edge of the film frame distort looking like whisky/wine barrel.  I think all of
the lenses (used in SLR or P/S lenses, at least as I know) have some barrel or
pin cushion distortions regardless of focal length.  As I understand, generally
speaking, the zoom lenses are more prone to these distortions.
 
> 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?
>

When I do indoor snapshots/portraits with my 24mm or 35mm lenses I pay attention
to any straight objects and try to make them straight by tilting the camera or
avoid those objects in the frame.


> 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.
> 
Learn by mistakes.. if you can afford.
 
Regards,
Jim Terazawa

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