Sony Filed Patent for 60mm f/2 Lens

Egami, the Japanese Photography Blog has discovered a new patent filed by Sony. The new Sony patent describes a new 60mm f/2 prime lens.

At the same focal length Sigma and Tamron has lenses for several camera mounts. This lens may also be a new lens for the new Sony A7r full frame mirrorless camera.

Sony 60mm f/2 Lens Patent

sony-60mm-f2

Description and self-interpretation of the patent literature

  • Patent Publication No. 2013-238740
    • Publication date 2013.11.28
    • Filing date 2012.5.15
  • Example 1
    • Focal length f = 1.00mm
    • Fno. 2.0
    • Half angle ω = 19.62 °
    • 4 group 6 lens configuration
    • Three 5-sided aspherical
    • One ED glass
    • 35mm equivalent 60mm
  • Example 2
    • Focal length f = 1.00mm
    • Fno. 2.85
    • Half angle ω = 23.31 °
    • 4 group 6 lens configuration
    • Three 5-sided aspherical
    • One ED glass
    • 35mm equivalent 50mm
  • Seishibo negative-positive
  • Inner focus
    • The weight of the focus group
    • Fast AF
    • Video support
  • Increase the exit pupil distance by the third lens unit

via EG