RF 50mm f1.8 stm review.

Swerky wrote:

moon1029 wrote:

Karl_Guttag wrote:

Swerky wrote:

The digital picture have finished the review of the RF 50mm 1.8. Wasn't the larger mount diameter supposed to bring, among other things, less vignette to the image? Perhaps I'm wrong.
https://www.the-digital-picture.com/Reviews/Lens-Vignetting-Test-Results.aspx?FLI=0&API=0&FLIComp=0&APIComp=0&Lens=1528&Camera=1508&LensComp=989

I think that was the technical reason they gave for the RF mount over say Sony's E mount. But then it seems all the canon lenses, even the L-lenses have significant vignetting without any digital correction (seems to get mentioned in every technical review). I don't think any of the vignetting is being caused by the diameter of the opening, but more a factor of the lens design.

At the same time, there is amazing little chroma aberrations after correction. I wonder if these issues are linked. It feels like the Canon designers are designing lenses with correction expected. The let parameters go that can be corrected in software. Of course, correction comes at some cost.

I think that's a lens design trend rather than for technical reason. The EF 16-35 f/2.8L III has far more vignetting than the II version, and the RF 15-35 and EF-16-35 f/2.8L III are similar in this deparment. Canon's engineers are probably trading sharpness and contrast for vignetting.

I don't know if vignetting is related to sharpness and contrast, but yes as you mentioned the EF 16-35 II has noticeably less vignetting than the third version, thus vignette is not only related to mount diameter and the lens design that takes advantage of that. Although I haven't checked in what area the 16-35 III is better than the II.

I think the lenses are designed with greater consideration for the corrected image quality and less consideration for the pixel peeping in RAW images.   Their goal being to further distance them and their imaging performance from the camera evaluation metrics used by customers of the encroaching hordes making  smartphone alternatives.  Greater computational enhancement in camera using AI software in-camera and during post processing is the future of photography and video media creation.