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