Patents related to photo lenses

Started 6 months ago | Discussions thread
AiryDiscus Senior Member • Posts: 2,138
Re: Leica Summicron Mandler 1976

bclaff wrote:

Dibyendu Majumdar wrote:

https://patents.google.com/patent/US4123144A/en

Officially the Leica Summicron R 50mm f/2

Like many "50mm" lenses it's actually 52mm

With how much distortion?  Odds are pretty good that with the barrel distortion it has the field of view of a 50mm lens, or 50mm +/- some closer tolerance than 2mm.

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