Crop Factor, Low Light and Aperture with m4/3 lenses? Part 2

Started 3 months ago | Discussions thread
Anders W
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Re: Crop Factor, Low Light and Aperture with m4/3 lenses? Part 2
In reply to Just another Canon shooter, 3 months ago

Just another Canon shooter wrote:

Anders W wrote:

Just another Canon shooter wrote:

Anders W wrote:

Just another Canon shooter wrote:

Anders W wrote:

"What is known based on the laws of optics is that if we take a lens design for a certain format, say a 50/1.8 for FF, and scale it down in all relevant dimensions so as to make 25/1.8 for MFT, the two lenses will deliver the same resolution if we measure per image diagonal (and the MFT lens twice as much as the FF lens if we measure per mm) at the same f-stop as long as resolution is limited by lens aberrations only."

There is no such thing as limited by lens aberrations only.

In optical theory there is.

No, there is not.

Yes there is.

You cited a formula yesterday that you do not understand,

What makes you think I do not understand it?

that proves you wrong.

The formula says nothing about diffraction versus aberrations. It just says something about the way lens resolution and sensor resolution combine into image resolution.

Combine or one limits resolution only?

It follows from the formula that image resolution increases when either lens or sensor resolution increases.

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