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Canon Working On A Full Frame Mirrorless Camera?
That's what a Patent spotted by Egami (translated) appears to suggest, if I am not misunderstanding the poor machine translation:
Canon SLR full size corresponds to 50 mm F1.2 and corresponds to the full size mirror-less 50 mm F2 of the patent is pending. Because large-diameter lens symmetrical with the axial chromatic aberration is corrected by using the anomalous dispersion glass which has been optimized, you can expect the performance. We are starting to design-conscious companies with full size mirror-less, the emergence of full-fledged full size mirror-less would be a matter of time.
Patent description:
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Patent Publication No. 2012-247451
- Release Date 2012.12.13
- Filing date 2011.5.25
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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
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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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General symmetric lens
- Compensation of magnification chromatic aberration can be
- Difficult to correct axial chromatic aberration and the large-diameter
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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
[via Egami]