[quote name='angrypizza' timestamp='1280426170' post='1394']
thank you for your reply, i saw the sigma 24-70 mtf graph with the d3 going somewhere around 3500 LW/PH f1/4 i thought larger fx lenses like this lens would get close to those values even with a dx camera but i can see with the link you gave me its a way lower than that . . disappointing . . so i guess this is a boost that only full frame cameras can provide with these lenses . [/quote]
This is a sensor limitation, not a lens limitation. A sensor can only resolve according to the MP it has on board, well, for each of its linear measurements (height, width, diagonal) the resolution is half of the number of pixels, and really slightly less due to the fact that we have a Bayer pattern as well.
On top of that there also are the optical laws, which state amongst others that inverse total resolution is equal to the sum of the inverse resolution of the medium (the sensor in this case) and the inverse lens resolution.
This doesn't seem to work entirely well for sensors (in the favour of sensors), due to the fact that the AA-filter is a cut-off filter which allows for higher resolutions to show than we might expect based on calculations, due to this cut-off, namely, much closer to the Nyquist frequency of the particular sensor. IOW, more than we would get or expect from film with a similar resolution. The latter is especially true for the lower MP sensors (< 10 MP for APS-C, less than 15 MP for FF), where resolution of good lenses brings much more than the sensor resolution to the optical equation.
Quote:apart from this is there anyway this website can review nikon 35-70 2.8 with a d200 ?if yes who should i contact or post to ask to?
In short, a D200 will never ever reach the resolution of the D3x, becuae ti physically can't, but in combination with a good lens it will likely always perform very close to its limits, or maximum.
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 ....