Canon Files a Patent for a Bunch of Lenses.
By| December 16, 2011
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)
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