Sensor size and MP vs lens limits?

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MarkMyWords Regular Member • Posts: 307
Sensor size and MP vs lens limits?

Out of curiosity, what is the effective MP resolution of current high-end FF lenses (or any format actually)? I.e. can they fully resolve say a 100MP sensor?

Also, is there a sensor size sweet spot to minimise the impact of lens imperfections? What I mean is, an absolute glass imperfection of say 0.001mm with FF creates only 50% the image error compared with MFT, all else being equal. Not all else is equal, e.g. absolute lens precision is presumably more difficult as size increases? Corollary: a FF lens on a crop sensor camera with the same MP will give comparably lower resolution performance if sensors are beyond the MP limit. I think.

In practice, I’ve had great results using a FF lens with APS-C, so I’m guessing this MP limit is fairly high.

Also, does MF allow higher MP because of sensor pixel density limits, or the lens limit factor described, or simply higher price bracket?

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