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Canon EF 11-24mm f/4 USM L revisited at 21mp


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#1 Klaus

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Posted 12 November 2016 - 11:39 AM

http://www.photozone...940-canon1124f4


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#2 Rover

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Posted 12 November 2016 - 01:00 PM

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.



#3 Klaus

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Posted 12 November 2016 - 01:07 PM

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).


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#4 Brightcolours

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Posted 12 November 2016 - 01:17 PM

The 5DSR has 154% the resolution, so logically CA will be 54% higher.



#5 Rover

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Posted 12 November 2016 - 01:45 PM

CA, yes, but is that the whole story?



#6 Brightcolours

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Posted 12 November 2016 - 02:44 PM

CA, yes, but is that the whole story?

See the now locked thread.



#7 youpii

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Posted 12 November 2016 - 09:22 PM

Thanks but you should also update the introduction: "It is the widest, fully corrected full format lens in existence" is no longer accurate.

 

https://voigtlaender...ar-e-mount.html



#8 Klaus

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Posted 12 November 2016 - 10:58 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.


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#9 Rover

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Posted 13 November 2016 - 11:14 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...)



#10 Klaus

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Posted 13 November 2016 - 11:54 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...)

 

About half a day.


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