Patents related to photo lenses

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

bclaff wrote:

AiryDiscus wrote:

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.

Go to the Optical Bench (follow the link) and turn on "SurfaceI" to see the curvature of field.

For more information you'll need to try a more sophisticated program.

I said distortion not field curvature.

Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow