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Having hopefully just received a good copy of the Sigma 10-20 (after 2 awful ones) I'm considering polariser options, one is pretty much permanently on my Sigma 17-70...
the problem with wide angle lenses is I believe that polarisers can create uneven polarisation effects but to current owners just how bad are these "effects" ?
I normally go with Hoya Pro 1 D filters but a 77mm one is very expensive, is there a similiar quality viable alternative ?
Any advice much appreciated
simon