The current EF 50mm F1.4 USM lens

Canon has just filed a new patent of EF 50mm F1.4 lens. This new lens is rumored to have IS feature. The current Canon EF 50mm F1.4 USM lens, released in 2003, is one of the best selling lenses for EF mounts.

• Patent Publication No. 2015-138121
  • Published 2015.7.30
  • Filing date 2014.1.22
• Example 1
  • Focal length 49.10
  • F number 1.45
  • Half angle (in degrees) 23.78
  • Image height 21.64
  • Overall length of the lens 100.16
  • BF 38.10
• Canon patents
  • Positive ShiboTadashi
  • Inner focus (part of the first group)

Source: EG

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