Is my thinking about equivalence right?

Started 3 months ago | Questions thread
bobn2 Forum Pro • Posts: 69,811
Re: Is my thinking about equivalence right?

SrMi wrote:

Olymore wrote:

Based on that argument the image captured by my 20mp phone needs enlarging the same as my m43 20mp image if I am viewing the results at the same size, which is not correct.

The size of the image captured will determine how much enlargement is required to view the image at a given output size.

What does it mean in practice?

Hypothetically, if I shoot a scene with m43 at f/2.8, 1/100, and FF at f/5.6, 1/100, both 20MP, what kind of theoretical difference should I expect, assuming the necessary enlargement is the only factor?

If your lenses project the same MTF (in cycles per millimetre) onto the sensor, which I assume must come along with 'enlargement being the only factor', then if you enlarge them to the same viewing size, then the FF image will look sharper. But that's where we started from....

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