From DXOMark: More pixels offsets noise3

Started May 30, 2009 | Discussions thread
DSPographer Senior Member • Posts: 2,464
Re: Bob..

Kuivaamo wrote:

I'm aware of all this, hence me placing "outresolve" in inverted
commas. I would expect much higher lp/mm results in all the lens
tests if lenses really were diffraction-limited at f8. There's no
reason why an aberration-free optic would resolve less at f8 than
f5.6 on a 50D; with a high contrast target the 50D can resolve only
about 70% of what I'd expect an ideal lens to deliver at f8.

The only lens I listed that was reviewed by this site is the 50/1.8. It showed maximum resolution at f4.5 not f/8 and it had greater that Nyquist MTF50 on the 450D even though the camera anti-aliasing filter should ideally been removing all content above the Nyquist frequency.

 DSPographer's gear list:DSPographer's gear list
Canon PowerShot G7 X Canon EOS 5D Mark II Canon EF 24mm f/2.8 Canon EF 50mm f/1.8 II Canon EF 200mm f/2.8L II USM +4 more
Post (hide subjects) Posted by
tko
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