[Guest]

[quote name='genotypewriter' timestamp='1285220564' post='3118']

Then I'm wondering why you said that the [url="http://forum.photozone.de/index.php?/topic/366-next-pz-lens-test-report-nikkor-af-s-24mm-f14-g-ed/page__view__findpost__p__3069"]Canon has non-existing border behaviour[/url], keeping the center-corner differences shown at f/1.4 between the N and C in the graphs aside <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='' />

[/quote]



Could it be that "border" vs. "corner" is the issue here?

[Klaus]

[quote name='BG_Home' timestamp='1285221654' post='3122']

Could it be that "border" vs. "corner" is the issue here?

[/quote]



Yes, I meant corners - not borders. Sorry for the typo.

[Klaus]

[quote name='Klaus' timestamp='1285223252' post='3125']

Yes, I meant corners - not borders. Sorry for the typo.

[/quote]



Just to mention - there's, of course, still some resolution - we defined a 3px blur as "poor". That's still sufficient to recognize coarse structures. All the micro-contrast is gone though. So "non-existing resolution" has to be seen in relation to this definition. A 3px blur is equivalent to a "local" resolution of ~2-3mp rather than 21mp. If you take a 2-3px image it'll still print great on 10x15cm. However, you don't need a DSLR for this (unless you're after shallow DOF, of course).

[genotypewriter]

I was looking at the ImaTest Explanation link so I couldn't find the regions of interest but now found them in the Len Test FAQ. Thanks.





[quote name='Klaus' timestamp='1285223775' post='3126']

Just to mention - there's, of course, still some resolution - we defined a 3px blur as "poor".

[/quote]

I'm just wondering how you explain the differences between off-center resolution figures that you calculated and the ones I observed. Because we have made opposite observations and I have shown my results.





[quote name='Klaus' timestamp='1285223775' post='3126']

If you take a 2-3px image it'll still print great on 10x15cm.

[/quote]



I can confirm that a 2MP image shows the off-center problems, especially with point light sources... for example in 1080P video. But, as I have been saying, both lenses are close in this regard.