This article is from Seying Wuji
A new patent application from Canon Inc. indicates that the company may be interested in the EOS R system.
Canon patent application 2020-166234A, which discusses RF 8- The optical design of the 15mm f/4 fisheye lens. The lens appears to be a mirrorless version of the EF 8-15mm f/4 fisheye lens.
Zoom ratio: 1.85
Focal length: 8.10 12.51 15.01mm
F value: 4.10 4.10 4.10
half angle of view: 90.14 90.45 90.39
Image height: 11.50 18.00 21.60mm
Lens length: 123.74 111.21 109.67 mm
Back focal length: 11.78 20.27 24.66mm
CW I think this lens will be put on the market sooner or later. By the way, this is not the first patent for the EOS R system fisheye lens.
Author:SINA,If you need to reprint,please indicate the source:http://www.todaycamera.com/camera-reviews/canon-rf-8-15mm-f-4-fisheye-zoom-patent-exposure
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