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 21.64 21.64 21.64 21.64 21.64
Whole length 217.72 217.72 217.72 217.72 217.72
BF 22.47 2 2.47 22.47 22.47 22.47
Focal distance 72.00 114.84 146.00 92.60 123.41
F number 2.06 2.06 2.06 2.06 2.06
a half field angle 16.72 10.67 8.43 13.15 9.94
Image height 21.64 21.64 21.64 21.64 21.64
Whole length 210.32 210.32 210.32 210.32 210.32
BF 21.80 21.80 21.80 21.80 21.80
The optical formulas show a very short zoom range, but being an f/2 lens, that would make some sense.
Optical formulas in the application:
- 90-130mm f/2
- 70-125mm f/2
- 70-125mm f/2 (shorter backfocus)
I would really like to see something like that in RL.
Esp. lenth, feel in the hand and - of course - IQ.
Now that Nikon has announced, they’re being criticized for the new Z mount lens selection. It would be nice if this (these?) lens(es) would be announced at the same time as Canon’s New cameras.
Most definitely. And I would think it would be an ideal portrait zoom - essentially consolidating the 85mm F/1.8 USM, 100mm F/2 USM, and 135mm F/2L USM into one lens. For the 90-130mm F/2 at least. But the 70-125mm is an interesting focal length as well.
Then again, why make things complicated with all those elements if it's just a paper exercise so maybe this is a lens that's being developed. As others have pointed out, it's perfect for portraits (though maybe I'd like it to be a little longer but that could just be because I've got a large, unflattering nose)