Canon Patents

Patent: Canon RF kit zoom lenses

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CanonNews discovered another patent detailing some interesting kit zooms that start off at the ultra wide-angle.  It’s unknown if Canon would ever make such a lens, but the zoom range is very intriguing.

It’s also a lens that could double for a standard lens for APS-C.  However, it would bigger than it would need to be since it’s designed to cover the full frame image circle.

This is the second patent found with these lenses, indicating to me at least, that there is active interest inside of Canon for this type of lens.

Canon RF 17-70 F3.5-F5.6

focal length        17.40  35.02  68.69
F-number             3.57   4.18   5.85
half-field angle    51.19  31.71  17.48
Image height        21.64  21.64  21.64
total lens length  149.59 133.68 150.50
BF                  13.43  27.63  57.99

Canon RF 18-80 F3.5-F5.6

focal length        18.70  37.55  77.50
F-number             3.57   4.18   5.85
half-field angle    49.16  29.95  15.60
Image height        21.64  21.64  21.64
total lens length  146.50 128.90 147.50
BF                  15.19  27.72  59.84