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 100mm f/2 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