Canon Patents: EF 800mm f/5.6, 600mm f/4, 500mm f/4, 400mm f/2.8 Lenses

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Canon has filed three new patents for EF 800mm f/5.6, 600mm f/4, 500mm f/4, 400mm f/2.8 Lenses, which are designed for Canon 35mm full-frame sensor camera.

Canon EF 800mm f/5.6 Lens

Specification and lens arrangement of embodiment 4
Focal length: 778.44 mm
F no: 5.80
ω : 1.59
Image height: 21.64 mm
Lens length: 489.01 mm
Back focus: 48.66 mm

Canon EF 600mm f/4 Lens

Specification and lens arrangement of embodiment 1

Focal length: 584.99 mm
F no: 4.12
ω : 2.12
Image height: 21.64 mm
Lens length: 476.28 mm
Back focus: 87.97 mm

Canon EF 500mm f/4 Lens

Specification and lens arrangement of embodiment 2
Focal length: 489.05 mm
F no: 4.12
ω : 2.53
Image height: 21.64 mm
Lens length: 411.08 mm
Back focus: 86.24 mm

Canon EF 400mm f/2.8 Lens

Specification and lens arrangement of embodiment 3
Focal length: 392.56 mm
F no: 2.90
ω : 3.15
Image height: 21.64 mm
Lens length: 371.16 mm
Back focus: 59.99 mm

Via: Hi-lows-note