Patents related to photo lenses

Started 6 months ago | Discussions thread
bclaff Forum Pro • Posts: 10,490
Re: Canon EF 50mm f1.0L
1

Dibyendu Majumdar wrote:

https://patents.google.com/patent/US4717245A/en

Here it is:

Note it is also actually 52mm.

Note also there is insufficient precision in the aspherical coefficients to properly trace rays far off the optical axis so it looks (falsely) as if there is bad abberation in the marginal rays.

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

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