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Sigma 100-300 EX F/4 replacement for Canon FF

Started Jun 6, 2015 | Discussions thread
OP Davenor Junior Member • Posts: 46
Re: Sigma 100-300 EX F/4 replacement for Canon FF

Yes perhaps it's an alignment issue. Too me all corners/sides are equally bad to it doesn't appear to be some kind of lens element decentering though. Perhaps I would be more inclined to fix it if someone could show me a FF Sigma 100-300 sample image of a flat surface with nice sharpness all over the frame. 

The upgrade itch is very strong at the moment so I might pull the trigger on a 70-300L this evening. 

 Davenor's gear list:Davenor's gear list
Canon EOS 7D Canon EOS 6D Canon EF 135mm F2L USM Tokina AT-X 16-28mm f/2.8 Pro FX Sigma 35mm F1.4 DG HSM Art +3 more
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