A patent application showing an unusual f/2 zoom from Canon has appeared in Japan (Patent application: 2018-132675). It’s possible that this zoom lens is related to a mirrorless camera body with its short BF distance.
Canon News tells us that the patent itself deals with a floating focus system to help reduce the size of the lens.
Japan patent application 2018-132675:
Focal distance 90.00 125.01 145.99 109.96 130.49
F number 2.06 2.06 2.06 2.06 2.06
a half field angle 13.52 9.82 8.43 11.13 9.41
Image height 21.64 21.64 21.64 21.64 21.64
Whole length 242.35 242.35 242.35 242.35 242.35
BF 16.70 1 6.70 16.70 16.70 16.70
Focal distance 72.03 115.04 145.99 92.39 123.70
F number 2.06 2.06 2.06 2.06 2.06
a half field angle 16.72 10.65 8.43 13.18 9.92
Image height ...
Continue reading...