11-12-2016, 10:39 AM
Canon EF 11-24mm f/4 USM L revisited at 21mp
Looks like even the absolute values (regardless of bar height) are better on the 5D Mark II. We've seen that in the 20/1.4 review but it's pretty well confirmed with another lens now, across the zoom range to boot.
It is not that easy. And only a few numerical values are actually better in the 21mp MTF. This is mostly an impact from CAs. High CAs result in a penalty in Imatest. Beyond about 2.5px the MTFs are increasingly affected. And the 21mp images have far less CAs at 11mm (in terms of pixel widths).
11-12-2016, 12:17 PM
The 5DSR has 154% the resolution, so logically CA will be 54% higher.
11-12-2016, 12:45 PM
CA, yes, but is that the whole story?
11-12-2016, 01:44 PM
Quote:CA, yes, but is that the whole story?See the now locked thread.
11-12-2016, 08:22 PM
Thanks but you should also update the introduction: "It is the widest, fully corrected full format lens in existence" is no longer accurate.
11-12-2016, 09:58 PM
The 21mp are relatively sharper on pixel level thus more receptive to sharpening - initially I didn't understand what Brightcolors intending to say there. That is correct.
11-13-2016, 10:14 AM
So, the question is in the air - how much time/effort does the retest take? (since you don't have to write most of the text part, test for vignetting / distortions...)
11-13-2016, 10:54 AM
Quote:So, the question is in the air - how much time/effort does the retest take? (since you don't have to write most of the text part, test for vignetting / distortions...)
About half a day.
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