Patent: EF 15mm f/4 & EF-M 9.5mm f/4

A new patent showing an optical formula for a new wide angle prime has appeared. The full frame lens in the application is an EF 15mm f/4, while the APS-C optical formula of a EF-M 9. 5mm f/4 shows a shorter backfocus than an EF-S lens and could actually be EF-M.

Japan Patent Application 2018-004726 Canon EF-M Read more. . . .

ef-m patent

2018-1-11 18:34

ef-m patent → Результатов: 2 / ef-m patent - фото

Patent: Canon EF-M 15-45mm f/1.8-3.5

A patent showing a faster version of the EF-M 15-45mm has appeared in the form of three separate optical formulas. EF-M 15-45mm f/1.8-3.5 EF-M 15-45mm f/2.0-4.0 EF-M 15-45mm f/2.8-5.0 Canon News Summarizes: It also looks like it may be the first canon lens patent application that I’ve seen that specifically mentions that distortion abberation control Read more... »

2017-11-18 16:53