Canon Patent for EF 85mm f/1.8 IS, 100mm f/2 IS, 135mm f/2.8 IS Lenses

Egami has spotted a new patent filed by Canon. The new patent describes the EF 85mm f/1.8 IS, 100mm f/2 IS, 135mm f/2.8 IS telephoto prime lenses.

The new Canon patent shows that these lenses soon will get image stabilizer feature. After these patents for EF 85mm f/1.8 IS, 100mm f/2 IS, 135mm f/2.8 IS lenses become available, we’ll see IS on all their mid-range primes soon.

Canon Patent for EF 85mm f/1.8 IS, 100mm f/2 IS, 135mm f/2.8 IS Lenses

EF-85mm-f-1.8-IS

EF 85mm f/1.8 IS

EF-100mm-f-2-IS

EF 100mm f/2 IS

ef-135mm-f-2.8-is

EF 135mm f/2.8 IS

 

Description and self-interpretation of the patent literature
  • Patent Publication No. 2014-10283
    • Publication date 2014.1.20
    • Filing date 2012.6.29
  • Example 1
    • Focal length f = 85.56mm
    • Fno. 1.86
    • Angle of view 2ω = 28.4 °
    • Image height Y = 21.635mm
  • Example 2
    • Focal length f = 102.06mm
    • Fno. 2.00
    • Angle of view 2ω = 23.9 °
    • Image height Y = 21.635mm
  • Example 3
    • Focal length f = 131.00mm
    • Fno. 2.80
    • Angle of view 2ω = 18.8 °
    • Image height Y = 21.635mm
  • Canon patents
    • Positive and negative positive
    • Inner Focus (group 2)
    • (Part of the third group) antivibration

via EG