Here are four new patents for Canon lenses, posted at the CanonNews. Canon will use cheaper focus systems, versus the high torque USM motors. See the details below:
Optical Formulas Covered in the Patent:
- 11-22mm f/4-5.6
Focal distance 11.33 15.16 21.84
F number 4.10 4.65 5.72
a half field angle– 50.33 42.03 32.02
Image height 13.66 13.66 13.66
Whole length 88.44 85.64 87.26
BF 9.00 14.02 22.72
- 24-70mm f/2.8
Focal distance 24.76 30.10 67.98
F number 2.92 2.92 2.91
a half field angle — 41.15 35.71 17.65
Image height 21.64 21.64 21.64
Whole length 198.84 183.00 165.88
BF 38.37 38.37 38.37
- 35mm f/2.8
Focal distance 36.10
F number 2.92
Half field angle 20.73
image height 13.66
Whole length 98.76
BF 35.46
- 18-150mm f/3.5-6.3
Focal distance 18.56 48.87 145.41
F number 3.60 5.56 6.49
a half field angle — 36.35 15.62 5.37
Image height 13.66 13.66 13.66
Whole length 103.26 118.62 145.33
BF 10.65 10.65 10.65
They do not know if these are EF, EF-S, or EF-M lenses, or a mixture of all three mounts.
Read More Canon Lens Patent