Canon RF 14-21mm f/1.55, 12-20mm f/2.0 and 16-32mm f/2.8 full-frame mirrorless lenses patented
Canon filed a patent (20180314060) for a new RF wide-angle full-frame mirrorless zoom lens. As it is typical with lens patents, three different calculations were presented - 14-21mm f/1.55, 12-20mm f/2.0 and 16-32mm f/2.8:
Focal Length 14.50 17.45 21.00
F-Number 1.55 1.55 1.55
Image Height 21.64 21.64 21.64
BF 17.10 21.64 21.64
Focal Length 12.00 15.49 20.00
F-Number 2.00 2.00 2.00
Image Height 21.64 21.64 21.64
BF 14.88 14.88 14.88
Focal Length 16.00 22.62 32.00
F-Number 2.80 2.80 2.80
Image Height 21.64 21.64 21.64
BF 21.35 21.35 21.35
Via Canonnews
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