Archive for: EF 50 f/2

Patent: A New Canon EF 50 f/1.2 & Suggestion of a Full Frame Mirrorless?

Patent: A New Canon EF 50 f/1.2 & Suggestion of a Full Frame Mirrorless?

New Canon 50 f/1.2
A new patent has surfaced that shows a new design for an EF 50 f/1.2 lens. The current 50L has somewhat of a mixed reputation due to some focus shift.

Also shown is potentially a 50 f/2 for a full frame mirrorless camera as it mentions a 22mm back focus distance. Keith at [NL] is reading the patent that way, and that interpretation looks plausible. If anyone is better at reading and interpreting the patent than we are, please let us know.

  • Example 1
    • Focal length f = 51.70mm
    • Fno. 1.25
    • Half angle of view ω = 22.71 °
    • Image height 21.64mm
    • 105.65mm length lens
    • BF 40.00mm
    • Nine 6 groups lens configuration
    • One one aspherical surface
    • Maximum effective diameter 45.16mm
  • Example 4
    • Focal length f = 50.00mm
    • Fno. 2.06
    • Half angle of 23.40mm
    • Image height 21.64mm
    • Length 72.62mm lens
    • BF 28.86mm
    • Eight four group lens configuration
    • No aspherical
    • Maximum effective diameter 33.34mm

Source: [EG] via [NL]

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