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The Optical Bench of the great Bill Claff does not contain tests, but the processed data of patent applications. The realised lens may then be somewhat different. But it is an excellent source of lens information.

I have had very good experiences with an EOS R and the good old EF 16-35mm f4. I used it at 24mm. This gives me a stitched high resolution panorama of 28,000 x 14,000 (the R has 30 MP). For this, 24 shots were taken: 12 at 0° vertical, 6 at +60°, 6 at -60° vertical. One problem is the depth of...

A Dpreview Myth: "High ISO noise performance in Raw remains around one stop behind the Sony a7 III" There are measured values from the meticulous Bill Claff, who even Dpreview uses from time to time as an expert. And according to Bill Claff (PhotonsToPhotos.net) the "Low Light EV" of the EOS R...