AFS-S issue - Returning my XT5

DanFry wrote:

Yannis1976 wrote:

DanFry wrote:

BeatX wrote:

What? Did I just read again, that another X-T5 user reports false focus box confirmation in this new improved Fuji auto focus system? What is going on here?

If you refer to my post, then no, since I am not (yet at least) an X-T5 user. I was talking about diffraction, with APS-C 40 MP @ f/8, forgot to say that key word. Diffraction negatively affects the level of detail in an image, be it otherwise in focus. That's my understanding at least and one of the factors that make me hesitate to upgrade to the X-T5 for my mostly landscape photography.

Dan

I think that diffraction starting point is related to sensor size and not its resolution, but could be wrong. Personally I haven't experienced with the XT5 any worse IQ due to f8 yet...

No, that is not my understanding. Diffraction is a function of pixel size only, the smaller they are, the more diffraction as you close down aperture. That is my firm understanding, but happy to be corrected with a scientific exposé

Dan

There is a detailed description of diffraction depending on sensor size, pixel size and aperture on the website:

https://www.cambridgeincolour.com/tutorials/diffraction-photography.htm

Almost at the end of that page there is a "Diffraction Limit Calculator" (better active "show advanced") that is very useful to check at which aperture diffraction will be effective.

For the APS-C 40 MP (X-T5) the diffraction starts at f/8. I selected as max. print size 60 cm and viewing distance 25 cm. It does not make any difference, whether the camera has 26 MP or 40 MP in this case.