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i believe the 18-55mm has field curvature that curves inward while the new zeiss has field curvature that curves out (at least at the wide end).
i had the same thought
Can you make some on one of those wierd steps between f8 and f11? Im for example using f9 quite a bit with my old zoom lens.. cause f8 is sharp but not that much DOF and not "perfectly even" but f11 is starting to be too soft.
Otherwise, I think it really is close to old 16-80. How much CA does it have without using CA removing? Btw. is it distortion corrected or not? (that could actually explain those corners too)
If you cant check it, just upload few RAW files (16, 28, 35, 50, 70 @ f9 or so). I...Show more →
The charts on page 1 are taken without CA correction, i would say better than the kit but not by much.
Distortion isn't corrected.
here are some "real world" images, mostly at f9. If you would like to see the raw just send me an email @ reeve.phillipgmail.com
16mm_f10_SEL1670F4Z (1 of 7) by reevedata, on Flickr
32mm_f9_SEL1670F4Z (7 of 7) by reevedata, on Flickr
19mm_f9_SEL1670F4Z (6 of 7) by reevedata, on Flickr
30mm_f9_SEL1670F4Z (5 of 7) by reevedata, on Flickr
16mm_f9_SEL1670F4Z (4 of 7) by reevedata, on Flickr
70mm_f5.6_SEL1670F4Z (3 of 7) by reevedata, on Flickr
19mm_f4.5_SEL1670F4Z (2 of 7) by reevedata, on Flickr