Patent: Multiple small RF prime lens optical formulas
Thank you Del Paso... As soon as I really used the Voigtlander Skopar 21 -- I returned it to the dealer. Terrible magenta in all corners and Adobe RAW could not remove it by profile. Then I went to eBay and bought another Canon 20mm f2.8 -- a treasure of a lens!DON'T !!!!
I have the 21 Leica M lens (non-aspherical).
Mounted on the EOS R, it generates a reddish hue on the sides of the pictures, like all M lenses below 35 mm, you can even see it in the viewfinder!
The Leica sensors have therefore specifically oriented microlenses against this phenomenon.
Maybe (?) the asph. type behaves differently, even though I doubt it.
PS: the Leica R 21 mm is not really good...
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