flavio81
Member
The entrance and exit pupils of the symmetrical lenses for RF cameras are about the same size - hence no distortion @ any ƒ/stop and focus distance.
With asymmetrical wides for SLR (or RF), the pupils are of different size - hence the distortion with variable form, tied to focus distance etc. etc.
In case some magazines in the 1960's said otherwise because their advertisers asked - it's a free world that runs on money.![]()
No... I own the above lens (the retrofocus, SLR one) and it is indeed free from distortion and sharp to the edges, for all practical purposes and practical shooting distances. Not theory but actual, usable results.
The world has moved to SLR long, long ago. I understand there rangefinders can have their advantages, but "distortion free wide angles" are not a rangefinder-exclusivity anymore.