02-24-2012, 10:17 PM
[quote name='IanCD' timestamp='1330041183' post='16110']
Hi Wim,
I didn't think I was indicating that any lenses do 'improve with digital'...? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='
' />
In the threads I linked to (there were others but it took me a while just to find those two..!) do you consider the talk of lenses 'struggling' with the higher-res / higher pixel density on D7000 is erroneous / misinterpretation of the results?
[/quote]
Yes.IMO that's erroneous talk.
There is no sensor yet which really gets to the same levels of resolution which a lens is capable of, a decent lens anway, and when used in photographic circumstances (forget MTF-50 charts, that's high contrast B&W stuff).
Any reasonably decent lens, even back in the olden days, is capable of 200-250 lp/mm at its sweet spot (F/8 - F/5.6), the best lenses out there even up to 400 lp/mm (F/4) at the Rayleigh criterion or MTF-9, in the centre anyway. That equates to 138 MP (200 lp/mm) to 553 MP (400 lp/mm for FF, 61 MP - 246 MP for APS-C (1.5 crop factor), and 35 MP to 140 MP for FT.
Kind regards, Wim
Hi Wim,
I didn't think I was indicating that any lenses do 'improve with digital'...? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='
' />In the threads I linked to (there were others but it took me a while just to find those two..!) do you consider the talk of lenses 'struggling' with the higher-res / higher pixel density on D7000 is erroneous / misinterpretation of the results?
[/quote]
Yes.IMO that's erroneous talk.
There is no sensor yet which really gets to the same levels of resolution which a lens is capable of, a decent lens anway, and when used in photographic circumstances (forget MTF-50 charts, that's high contrast B&W stuff).
Any reasonably decent lens, even back in the olden days, is capable of 200-250 lp/mm at its sweet spot (F/8 - F/5.6), the best lenses out there even up to 400 lp/mm (F/4) at the Rayleigh criterion or MTF-9, in the centre anyway. That equates to 138 MP (200 lp/mm) to 553 MP (400 lp/mm for FF, 61 MP - 246 MP for APS-C (1.5 crop factor), and 35 MP to 140 MP for FT.
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....
