Canon RF Patents: 16-28mm F2.8, 15-28mm F2.8-4 IS & 15-28mm F4-5.6 IS Lenses

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Canon has filed several new RF mount wide-angle patents for the 16-28mm f/2.8, 15-28mm f/2.8-4 IS and 15-28mm f/4-5.6 IS Lenses for Canon full-frame mirrorless cameras.

[Publication number] P2022063727
[Publication date] APRIL 22, 2022
[Patent application title] Optical system and imaging device

Canon RF 16-28mm f/2.8

Focal length 16.45 21.00 27.50
F number 2.88 2.88 2.88
Half angle of view 52.71 46.44 38.49
Real image height 19.00 21.00 21.64
Overall length 134.57 124.99 119.35
Back focus 14.07 14.07 14.07

Canon RF 15-28mm f/2.8-4 IS

Focal length 15.40 21.00 27.50
F number 2.88 3.50 4.04
Angle of view 54.51 46.40 38.65
Real image height 19.00 21.00 21.64
Overall length 114.50 109.55 110.39
Back focus 14.20 14.20 14.20

Canon RF 15-28mm f/4-5.6 IS

Focal length 15.40 21.00 27.50
F number 4.00 4.82 5.60
Angle of view 54.51 46.63 38.94
Real image height 19.00 21.00 21.64
Overall length 103.50 101.16 103.50
Back focus 14.20 14.20 14.20

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Via: Digicame-info