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 Post subject: Checking Exposure
PostPosted: Tue Oct 25, 2011 9:19 pm 
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Joined: Tue Aug 31, 2010 8:23 pm
Posts: 126
Hi all
I think i have an exposure issue with my Tokina 11-16mm UWA.
First noticed this with another issue with the internal focal length contacts where one was shorting, could be related or not.
Anyway...
Exposure at 11mm always seems ok at any f stop.
Exposure at 16mm is always over by about a stop when above f2.8.
Its very close at either end when at f2.8.
So to test this would taking a photo of a evenly lit white wall at either end of the zoom range give the same exposure, which i believe it should?
At the moment its nearly one stop more at the 16mm end over the 11mm end.
Changing the metering area doesn't seem to change things.
This problem does seem common with a batch of these from a few years ago.


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