Don't laugh too hard but..........

Started May 3, 2011 | Discussions thread
Joel Stern
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Re: Prog
In reply to Prognathous, May 6, 2011

Prognathous wrote:

Joel Stern wrote:

Prog, how can you tell this?

If you're referring to de-centering, then the easiest way to test for it is to shoot a far away detailed subject (like a cityscape) from a tall building using the wide-open aperture. If the sharpness falls off asymmetrically then the lens is de-centered. Normally the level of sharpness in the corners should be similar (for subjects at the same distance), and slightly less sharp than the center of the frame.

Prog.
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http://www.flickr.com/photos/oren_b

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