12MP, 16MP or 24MP for the 17-55 lens?

Started Apr 19, 2013 | Questions thread
Leonard Shepherd
Leonard Shepherd Forum Pro • Posts: 15,901
Re: Sigma 18-35...what price guess ?

pipee wrote:

According to DXO, the Nikon 17-55 barely resolves any more detail on the 16mp D7000 vs 12mp cameras. So the answer to OP's question is 12mp if we go by that.

It depends in part what you mean by "barely resolves any more detail".

As sensor resolution is mainly an inverse square law situation the D7000 sensor measured in isolation should resolve about 16% more detail than 12MP. 24 MP should give around 12.5% more file resolution.

The D7000 measured in isolation is likely to have somewhat more resolution then the best lenses at their optimum temperature measured in isolation. A 10 or 12% increase 12-16MP will be reasonable.

Some people pay a lot of money for a lens like a Zeiss MF to get a small amount of extra file resolution.

In fact, most mid range zooms have higher resolution than the Nikon 17-55 if you do the sharpness comparisons on DXO's website.

If you compare Nikon's official MTF wide open the 17-55 just about equals the DX crop on Nikon's 24-70 http://imaging.nikon.com/lineup/lens/zoom/normalzoom/af-s_dx_zoom17-55mmf_28g_if/index.htm

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Leonard Shepherd
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