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next PZ lens test report: Olympus M.Zuiko 7-14mm f/2.8 Pro
#11
Quote:It matters because the measurement was at close focus, so the effect might seem worse there than in "reality"?
 

See the sample images. The borders are softer than the MTFs suggest.

 

I think you should get over the idea that the measurements are close focus.

The object magnification is FAR beyond anything that you would consider to be a close focus scenario. Close focus ends a 1:10. At some stage I calculated this - was it 1:50 ? Something like this.

The object magnification is the same across all tested lenses.

 

In any case it just doesn't matter here - the field curvature is visible at infinity.

If I didn't spot this in the sample images I wouldn't have reported it (plus/minus human error that can always occur even during measurements). The MTFs are the beginning of wisdom but not the end of it.

  


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next PZ lens test report: Olympus M.Zuiko 7-14mm f/2.8 Pro - by longbowswift - 11-02-2015, 05:04 PM
next PZ lens test report: Olympus M.Zuiko 7-14mm f/2.8 Pro - by Klaus - 11-04-2015, 12:41 PM

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