Patents related to photo lenses

Started 6 months ago | Discussions thread
OP Dibyendu Majumdar Contributing Member • Posts: 758
Re: Sigma ART 50mm f1.4

bclaff wrote:

Dibyendu Majumdar wrote:

https://patents.google.com/patent/JP2015114366A/en

This fit was no so good as most:

Link .

I've decided this is not a fit for my purposes.

In addition to not matching the construction diagram the patent has an aspherical element whereas the lens does not.

Not sure I uderstood above, as the lens does have an aspherical element.

https://www.sigmaphoto.com/lenses/standard-lenses/50mm-f14-dg-hsm-a

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