Canon has issued several patents for ultra-long zoom lenses. Do you like any

2022-06-20 0 By

Canon recently published a series of patents for telephoto cannon lenses on the US Patent website, patent number: USPTO20220035144.These include: a RF150-600mm F5-6.3L;Rf200-400mm F4L;Rf200-500mm F4L;Rf300-800mm F8L one, example one 200-500mm F4 zoom ratio: 2.35 focal length data: short focal length: 206.00mm 316.02mm 485.01mm Aperture: 4.09 4.10 4.10 half Angle of view:6.00° 3.92° 2.55° Halfimage height: 21.64mm 21.64mm lens length: 486.99mm 486.99mm 486.99mm Rear focal length:Two, example two 200-500mm F4 zoom ratio: 2.35 focal length data: short focal length medium focal length: 206.00mm 316.09mm 485.00mm Aperture: 4.10 4.10 4.10 half Angle of view:6.00° 3.92° 2.55° Halfimage height: 21.64mm 21.64mm 21.64mm Lens length: 487.46mm 487.46mm 487.46mm rear focal length:150-600mm F5-6.3 zoom ratio: 3.79 focal length data: short focal length medium focal length: 154.50mm 312.26mm 585.00mm Aperture: 5.10 5.81 6.51 half viewing Angle:7.79° 3.96° 2.12° Halfimage height: 21.64mm 21.64mm 21.64mm Lens length: 288.00mm 338.00mm 388.00mm Rear focal length:Four, example four 200-400mm F4 zoom ratio: 1.9 focal length data: short focal length focal length: 205.00mm 282.75mm 390.00mm Aperture: 4.10 4.10 4.10 half Angle of view:6.02° 4.38° 3.18° Halfimage height: 21.64mm 21.64mm Lens length: 367.09mm 367.09mm 367.09mm Rear focal length:Five, example five 200-400mm F4 zoom ratio: 1.9 focal length data: short focal length medium focal length: 205.00mm 301.98mm 389.00mm Aperture: 4.12 4.12 4.12 half Angle of view:6.02° 4.10° 3.18° Half-image height: 21.64mm 21.64mm 21.64mm Lens length: 370.15mm 370.15mm 370.15mm Rear focal length:Six, example six 300-800mm F8 zoom ratio: 2.54 focal length data: short focal length focal length: 305.00mm 485.95mm 774.99mm Aperture: 8.09 8.10 8.10 half Angle of view:4.06° 2.55° 1.60° Halfimage height: 21.64mm 21.64mm 21.64mm Lens length: 489.78mm 489.78mm 489.78mm rear focal length:Seven, example seven 200-400mm F4 zoom ratio: 1.9 focal length data: short focal length focal length: 205.01mm 281.28mm 389.96mm Aperture: 4.10 4.10 4.10 half Angle of view:6.02° 4.40° 3.18° Halfimage height: 21.64mm 21.64mm Lens length: 367.02mm 367.02mm Rear focal length:Seeing that one of them is 150-600mm and the telephoto end is F6.3, will this be an affordable lens for amateurs like SONY’s FE200-600mm?The 300-800mm F8 is a zoom lens with unprecedented specifications, but Canon is actively promoting F8 and F11 telephoto lenses as RF lenses, so it may be productized.