What defines the upper bound for FX resolution/pixel density?

Started Aug 26, 2013 | Discussions thread
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jfriend00 Forum Pro • Posts: 13,687
What defines the upper bound for FX resolution/pixel density?

With rumors of a 54MP D4X on the horizon, I'm curious what defines the practical and physics limits for an FX sensor?  54MP on FX is about the same pixel density as 24MP on DX so obviously that pixel density can work.

How much higher can it or should the density go with Bayer sensors?

When does diffraction make the added benefit of more pixels not provide much or any benefit?

When does the resolving power of existing lenses become the bottleneck and more resolution won't really help?

Is there a theoretical limit beyond which the physics say you don't get any further benefit for the type of environment, lenses and light we're using?

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