(Megapixels) War...what is it good for....

[Jonathan Huyer]

I recall tests on this forum where the general conclusion was that crop factor cameras actually provided about 1.2x more resolving power compared to 1.6x. As a crop sensor camera is essentially a subset of a high resolution FF camera, I really do not see why the same would not apply to high MP sensors.

I hadn't heard that one before but it makes a ton of sense to me. It follows one of the fundamental principles of life that I like to refer to as the Law of Diminishing Returns

[Kayaker72]

I hadn't heard that one before but it makes a ton of sense to me. It follows one of the fundamental principles of life that I like to refer to as the Law of Diminishing Returns

Here is the thread I referenced.

Unfortunately, the link is broken to AlanF's analysis, but I recall he was taking DXOMark's P-Mpix (perceived megapixels) and comparing APS-C to FF. As the thread and Alan's analysis are a few years old, it is always possible that there have been improvements (better microlenses?). While I can not think of an APS-C camera with the same MP of a FF out of the current lineup, the 5DIV vs the 90D, if anything, should favor the 32.5 MP sensor and 3 year more modern 90D. Yet, I can still see a slight FF advantage here. So, same framing, distance adjusted, the 90D has more pixels on target, yet I'd take the 5DIV image quality over the 90D. It is getting close, though.