Patents related to photo lenses

Started 6 months ago | Discussions thread
OP Dibyendu Majumdar Contributing Member • Posts: 758
Re: Sigma 40mm f1.4 ART

bclaff wrote:

Dibyendu Majumdar wrote:

https://patents.google.com/patent/JP2020012952A/en

https://www.sigmaphoto.com/lenses/standard-lenses/40mm-f1-4-dg-hsm-i-art

Thanks. Related. But not a match by my standards. Example 1 is the closest:

Thanks Bill. I don't see the lens in your Optical bench yet?

Regards

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