Sigma 19mm vs 30mm...if you could only have one of them...

Started Jun 6, 2012 | Discussions thread
cptrios
Senior MemberPosts: 1,347
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Re: Sigma 19mm vs 30mm...if you could only have one of them...
In reply to ArnJ, Jun 6, 2012

The 30 is much sharper edge-to-edge than the 19 thanks to field curvature (on the NEX-7 at least) but this can be corrected to an extent by manually focusing a bit past what the camera thinks is "infinity" (I've found that CDAF cameras rarely get this right). If you do that on the 24MP NEX-7, then you'll have to print very large before you notice any border softness on the 19.

I will say, though, that the CA on the 30 is a bit easier to correct. I haven't played much with LR4's auto-correction on that front, though, so who knows.

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