Scott Stoness Offline Upload & Sell: On
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johnctharp wrote:
If someone is interested in doing the math, you could use DxO's 'P-MP' measure to compute 'effective pixel pitch' using the best lens for each camera/sensor. We might find that, for example, the 70D has very similar effective pixel pitch to the 5D III, and this would be explained by crop cameras needing glass that resolves much more detail in the image center. If glass that can truly resolve the APS-C image circle doesn't exist (and it appears that it doesn't), then we shouldn't see P-MP scores from APS-C cameras that match their sensor resolution like we do on some FF cameras and lenses.
We might find, also, just how much more resolving power Canon's best lenses have, than can be resolved by their best sensors, in the APS-C image circle at least. Would be nice to know just how much more resolution Canon would need on their FF system to actually make use of their (and Sigma's) sharpest lenses ....Show more →
The 300 f2.8 v2 yields 22 (dxomark) on a 22mpx camera (5diii). This suggests that the mpx of the camera was the limit as opposed to the lens so there are lens out there that are not llimiting the 22mpx (5diii) camera. In addition, the nikon 400 f4 yields 25 with a 36mpx camera (d800) which suggests that the canon lens would do even better since they are newer and have better florite coatings.
Anyway this does not mean that a crop camera would match the performance of ff but I suspect that many of canon lens are better than nikon (24-70, 600v2, 400v2, 24TS....) and more effective resolution on a crop camera still has room to be useful.
But to your question, I suspect that beyond 30mpx, the lens will be the limiting factor as opposed to mpx of the camera. [guessing a bit better than nikon for the 400 2.8 v2, 300 2.8 v2, and 600 4 v2 for example] But then again it could just be that the d800 cmos is limiting even these lens and it could be 50mpx. Soon we will find out when canon responds to the d800 next year (I am guessing).
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