李宗瑞下药迷奸继母网友:太荒诞,不是人(图) (转载)# Piebridge - 鹊桥
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Canon has filed patents for a bunch of fast aperture telephoto lenses.
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
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)
Canon has filed patents for a bunch of fast aperture telephoto lenses.
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
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)