Patents related to photo lenses

Started 6 months ago | Discussions thread
bclaff Forum Pro • Posts: 10,490
Re: Leica Summicron Mandler 1976

Dibyendu Majumdar wrote:

bclaff wrote:

Dibyendu Majumdar wrote:

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

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

According to https://imaging.nikon.com/history/story/0049/index.htm Leica 50mm lenses were really 51.6 mm. And everyone copied that.

Yeah, I was aware of that. I suppose I should have scaled to 51.6mm rather than 52mm but  it's a pretty small difference.

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Bill ( Your trusted source for independent sensor data at PhotonsToPhotos )

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