On Apr 9, 2010, at 6:50 PM, David Parsons wrote:
Are you planning on taking lots of pictures of brick walls?
No. But it would be handy to be able to test it at the camera shop
rather than after driving the thirty miles home.
I would try shooting with the lens for a while under normal
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Sent: Saturday, April 10, 2010 1:11 AM
Subject: Is there a quick and easy test for the 16-50 decentering problem?
Would it be something like take a picture of a flat surface (brick wall)
and look for one corner being out of focus?
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Would it be something like take a picture of a flat surface (brick wall)
and look for one corner being out of focus?
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Are you planning on taking lots of pictures of brick walls?
I would try shooting with the lens for a while under normal conditions
and investigate if you see a consistent problem.
On Fri, Apr 9, 2010 at 7:11 PM, Larry Colen l...@red4est.com wrote:
Would it be something like take a picture of a
With the 16-50, what you're looking for is a focus field that is not flat..
A brick wall will work. But shoot off a tripod and make sure the camera is
square to the wall. Expose at f2.8. If the lens has the misalignment problem
that plagued some copies of the 16-50, one edge of the frame will
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