APS-C IMAGE QUALITY VS fULL fRAME AT TESTING

Started Feb 24, 2013 | Discussions thread
qianp2k Forum Pro • Posts: 10,350
Re: I can help.

Donald Duck wrote:

qianp2k wrote:

Donald Duck wrote:

qianp2k wrote:

Not sure if this is true. Please give me a sample what Canon EF-S lenses are better than EF lens counterparts? 17-55/2.8 IS vs 24-105L? 60/2.8 macro vs 100/2.8 macro?

Yes to both, just not sharper enough to compensate for the enlargement penalty.

Were you find? I check DXOMark and TDP that both show 24-105L/4.0 IS with 5Dc performs better than EF-S 17-55/2.8 IS on 7D while performs almost the same on 7D despite 17-55/2.8 IS optimized on APS-C while 24-105L optimized on FF.

The question was - both lenses on the same body.

However EF-S lenses can only work on APS-C bodies so they are optimized on APS-C. EF lenses usually are designed for FF so they usually are not optimized on APS-C bodies.

The EF-60 is much sharper than the comparable EF-100 macro, and even sharper than the newer and more expensive 100L. The 17-55 and the 15-85 are sharper than the 24-105 or the 16-35.

I don't own EF-S 60/2.8 macro so cannot tell.  DXOMark shows 24-105L performs similarly on APS-C when compared to EF-S lenses 17-55 and 15-85. I don't own latter two EF-S lenses but own similar Sigma 17-50/2.8 OS that is actually a little sharper than 17-55/2.8 IS in most center area. In my tests, 24-105L and Simga 17-50/2.8 OS have about the similar sharpness on my 60D (that I cannot tell obvious difference) and 17-40L is a bit sharper. From what I read 16-35L is only better than 17-40L.

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