Four New Canon Lenses Patents:11-22mm F4-5.6, 24-70mm F2.8, 35mm F2.8 and 18-150mm F3.5-6.3

canon lens patent

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

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