Here’s a crazy optical formula patent from Canon, an EF 40-800mm f/4.5-5.6 superzoom lens. The folks at Egami say it’s for a full frame DSLR and is an internal zoom lens. Patent Publication No. 2016-128846 (Google Translated) Published 2016.7.14 Filing date 2015.1.9 Zoom ratio 19.42 Focal length 41.09 92.80 152.20 225.00 797.99 F-number 4.67 4.66 […]
from Nikon Digital SLR Camera With Lens
via Crazy Patent: Canon EF 40-800mm f/4.5-5.6
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