Edge sharpness of SEL35F18

Started Aug 25, 2014 | Discussions thread
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AHM Regular Member • Posts: 442
Edge sharpness of SEL35F18

I took the following picture with the 35mm at F2.5 (yes, I know that is not the ideal aperture for this kind of image, but I didn't have the chance to change aperture):

The center is sharp:

Center crop

But not really away from center:

Left edge crop

Is it an unrealistic expectation that the lens would be sharp edge to edge at F2.5? This is a pretty large aperture, but not wide open. Could the edge unsharpness have been caused by the polarizing filter?

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