Patent: Canon RF 17-35mm f/4-5.6 Lens

Canon has filed a new patents for RF 17-35mm f/4-5.6 Lens, which are designed for Canon EOS R system. Take a look at the patents details below: This patent application contains only two embodiments Canon Patent Application 2019-074633 Canon RF 17-35mm f/4-5.6 Focal length: 17.50mm 27.00mm 33.95mm F-number: 4.00 5.03 5.80 Half field angle: 51.03° 38.71° 32.51° Image height: 21.64mm […]

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Patent: Canon RF 24-70mm f/2.8L USM Lens

Canon has filed a new patent for RF 24-70mm f/2.8L USM lens in Japan, which has very similar specs as the RF 28-70mm f/2L USM lens. Canon RF 24-f/2.8L USM Patent Specifications: Focal Length: 24.69mm 37.63mm 67.88mm F-Number: 2.91 2.91 2.91 Half angle of view (degrees): 41.23 29.90 17.68 Total length of zoom lens (mm):  139.21mm 150.29mm 171.74mm Backfocus: 13.49mm […]

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