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Diffraction blur with the R5 and four prime lenses

Started 7 months ago | Discussions thread
Steve Balcombe Forum Pro • Posts: 15,571
Re: Diffraction blur with the R5 and four prime lenses

Very useful, thank you for posting.

I used to use Photozone (now known as Optical Limits) quite a lot for comparing lens performance, and the charts show this effect very nicely - here is your EF 35/1.4L (I) for example:

https://www.opticallimits.com/canon_eos_ff/516-canon35f14ff?start=1

Resolution peaks at f/2.8 in the centre, but f/5.6 at the borders where aberrations are greater and there is more benefit from stopping down.

It's interesting to look at a range of lenses, where you'll see a similar pattern with the peak varying according to the quality of the lens.

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