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next PZ lens test report: Carl Zeiss Vario Tessar T* FE 16-35mm f/4 OSS ZA
#21
Quote:I'm no expert in this but could you really bump resolution figures without knowing if the lens is the limiting factor? And what does Photozone's "excellent line"mean (which the Canon lens never passes outside the center).

 

It sounds like you're really want the Canon to be better...
There is another factor to take into account. Photozone uses sharpening in the MTF images workflow, which skews results somewhat. The A7r is AA-filterless, which will mean it will introduce some fake sharpness which the MTF software can't discern. To, don't put too much weight in small differences in he results, there. 

 

Don't put too much weight on vignetting figures either, they are measures from JPEGs I believe, and tend to differ from different cameras. This is what PZ says about that in case of Nikon (D3x) vs Canon tests:

"We're performing our vignetting analysis based on (uncorrected) JPEGs straight from the camera. The JPG engine of the Nikon D3x features a rather flat gradation curve, thus has a moderate contrast characteristic, resulting in comparatively low vignetting figures - the corresponding Canon figures are roughly 40% higher due to the more aggressive default contrast setting."

http://www.opticallimits.com/nikon_ff/44...ff?start=1

Most probably, the Sony lens indeed has more vignetting. But without comparing them on the same body, in PZ's testing methods, we can't know for sure.

 

CA is significantly better, but the imatest software is not really very good at testing the CA (sometimes it gives clearly wrong results).
  


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next PZ lens test report: Carl Zeiss Vario Tessar T* FE 16-35mm f/4 OSS ZA - by Brightcolours - 02-27-2015, 06:06 AM

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