07-06-2012, 11:35 AM
[quote name='Bobcity' timestamp='1341531866' post='19332']
Right, don't think it's focus, and maybe my expectations are too high.
Thanks.
[/quote]
Yet this lens gets stellar results in Photozone test. If Klaus or Markus reads this message, I would be very curious about the influence of the global contrast of a lens on its MTF results.
Since MTF relies on a measurement of contrast, it should be strongly affected by the contrast, which would explain why this lens, while getting high MTF scores, is not as sharp as one would expect.
However this is for a correctly centrered lens. If your lens is decentered, you should have it fixed or replaced.
Right, don't think it's focus, and maybe my expectations are too high.
Thanks.
[/quote]
Yet this lens gets stellar results in Photozone test. If Klaus or Markus reads this message, I would be very curious about the influence of the global contrast of a lens on its MTF results.
Since MTF relies on a measurement of contrast, it should be strongly affected by the contrast, which would explain why this lens, while getting high MTF scores, is not as sharp as one would expect.
However this is for a correctly centrered lens. If your lens is decentered, you should have it fixed or replaced.