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+--- Thread: Canon EF 11-24mm f/4 USM L revisited at 21mp (/showthread.php?tid=500)
Canon EF 11-24mm f/4 USM L revisited at 21mp - Klaus - 11-12-2016
http://www.opticallimits.com/canon_eos_ff/940-canon1124f4
Canon EF 11-24mm f/4 USM L revisited at 21mp - Rover - 11-12-2016
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.
Canon EF 11-24mm f/4 USM L revisited at 21mp - Klaus - 11-12-2016
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).
Canon EF 11-24mm f/4 USM L revisited at 21mp - Brightcolours - 11-12-2016
The 5DSR has 154% the resolution, so logically CA will be 54% higher.
Canon EF 11-24mm f/4 USM L revisited at 21mp - Rover - 11-12-2016
CA, yes, but is that the whole story?
Canon EF 11-24mm f/4 USM L revisited at 21mp - Brightcolours - 11-12-2016
Quote:CA, yes, but is that the whole story?See the now locked thread.
Canon EF 11-24mm f/4 USM L revisited at 21mp - youpii - 11-12-2016
Thanks but you should also update the introduction: "It is the widest, fully corrected full format lens in existence" is no longer accurate.
https://voigtlaender.com/10-mm--f-5%2c6-hyper-wide-heliar-e-mount.html
Canon EF 11-24mm f/4 USM L revisited at 21mp - Klaus - 11-12-2016
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.
Canon EF 11-24mm f/4 USM L revisited at 21mp - Rover - 11-13-2016
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...)
Canon EF 11-24mm f/4 USM L revisited at 21mp - Klaus - 11-13-2016
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.