Canon Files a Patent for a Bunch of Lenses.
All at once!
Canon has filed patents for a bunch of fast aperture telephoto lenses.
We’ve heard a number of times that Canon will update a lot of current lenses in 2012 and beyond. I think the 50 f/1.4 is the one that is in the most dire need of an update. An 85 1.2L III with a faster AF would also be welcomed. I hope they don’t update the 200 f/2L IS, I already love it and I would be forced to love the next one too at $6K+.
- 50 f/1.4
- 85 f/1.8
- 85 f/1.2
- 100 f/2
- 135 f/2
- 200 f/2
Patent literature, self-interpretation and summary
- Patent Publication No. 2011-253050
- Published 2011.12.15
- Filing date 2010.6.2
| Example | Focal length | Fno | Length Lens | BF | Lens Construction |
|---|---|---|---|---|---|
| One | 85.00 | 1.24 | 126.06 | 39.13 | Nine elements in 7 groups |
| Two | 85.00 | 1.80 | 113.00 | 42.34 | Nine elements in 7 groups |
| Three | 100.00 | 2.00 | 120.00 | 42.27 | Nine elements in 7 groups |
| Four | 133.30 | 2.06 | 158.90 | 51.86 | 10 sheets in 7 groups |
| Five | 196.00 | 2.05 | 223.50 | 50.00 | 15 pieces in 10 groups |
| Six | 51.70 | 1.41 | 89.92 | 39.00 | Eight elements in 7 groups |
Both the image height is 21.64mm (full size)
Read More at Egami (Japanese)
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