snowboarder wrote: Ron Pfister wrote:I wouldn\'t worry. The R28 E55 is stellar on the D800E, and I\'m not expecting anything less on the A7R. What were your negative experiences with this lens on the NEX-7?
I was quite shocked to see purple corners on NEX-7. But I guess I\'ll just wait a few days
and do my new fresh round of testing with the A7R...
I was puzzled by your response, to be honest. An SLR-design like the R28 E55 should not produce purple corners, particularly on APS-C. I had never used this lens on the NEX-7, so I made some test images, focused at 0.3m and infinity, both at f/2.8 and f/8.0. I then examined the RGB-values in the top corners (a uniform grey sky): not the faintest trace of a purple cast in any of the images. NB: I used a Voigtländer F Adapter to adapt the lens.
I suspect something\'s seriously wrong with your copy of the lens, your adapter or your NEX-7.
Nov 20, 2013 at 05:48 AM
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