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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
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