Sigma 35mm f1.4 and Zeiss 35mm f1.4 Imatested

Started Apr 9, 2013 | Discussions thread
Miljenko Devcic
Contributing MemberPosts: 963
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Re: Test Methodology
In reply to Miljenko Devcic, Apr 9, 2013

Please notice resolution irreguralities with Zeiss lens from f1.4 to f2.5. It is NOT a testing flaw or anything dealing with my procedures. Actualy, when those "hills and valleys" appeared on chart, I retested Zeiss lens taking no less than 10 separate measurements every 1/3 of a f/stop up to f5.6 but nothing changed. This is obviously something only Zeiss could explain...

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