According to the latest patent surfaced over the web, the 50mm F1.2 Lens is coming for a full-frame mirrorless camera, just few dyes ago we have seen lens patent made for Canon 4/3 mirrorless camera, Sure we will see a whole new range of mirrorless camera from Canon in 2013.
Self-interpretation and summary, Patent Documents
- Patent Publication No. 2012-247451
- Release Date 2012.12.13
- Filing date 2011.5.25
- 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
- General symmetric lens
- Compensation of magnification chromatic aberration can be
- Difficult to correct axial chromatic aberration and the large-diameter
- Canon patent
- Symmetric lens large aperture
- Positive, aperture, arranged in the order of the positive
- Using a high anomalous dispersion glass, the axial chromatic aberration is corrected
src – egami
I have been reading about these mirrorless cameras from Canon as well and it does look like they will be pushing this hard in 2013. they have certainly not applied for patents for nothing. I don’t fully understand them as yet but nice to see something different in the market.
Canon is continuously working on high-end mirrorless camera from past 2 year, we will sure see some high-end fullfame camera in near future.
106mm length. that sounds like it will have a flange distance shorter than EF mount.