New Canon 65 f/2.8 & 180 f/3.5 Macro Patents

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New Canon 65 f/2.8 & 180 f/3.5 Macro Patents

Postby Gian Luca Agnoli » 17 Nov 2011 17:52

New Patent Publication from Canon.

:photo: 65 f/2.8 Macro - Patent Publication No. 2011-191743
Focal length f = 65.00mm
Fno 2.90 – 3.05 – 3.96
Half angle of 18.41 °
Image height 21.64
145.08mm Length Lens
Back Focus 38.20 – 47.63 – 37.80mm
Positive and negative lens group of positive and negative 4
Inner Focus + Rear Focus
Group 2, Group 3, Group 4 to move the focus method

:photo: 180 f/3.5 Macro / 150 f/2.8 Macro / 135 f/2.8 Macro - Patent Publication No. 2011-191743
Focal length f = 180.00mm
Fno 3.50 – 4.60 – 5.80
6.85 ° half angle
Image height 21.64
225.02mm Length Lens
Back Focus 64.01mm
-------------------------------
Focal length f = 150.00mm
Fno 2.80 – 4.00 – 5.00
8.21 ° half angle
Image height 21.64
206.53mm Length Lens
Back Focus 49.00mm
-------------------------------
Focal length f = 135.00mm
Fno 2.80 – 3.80 – 4.80
9.20 ° half angle
Image height 21.64
205.00mm Length Lens
Back Focus 46.50mm
Four groups of positive and negative lenses accurately.

(source: cr canonrumors)
Gian Luca Agnoli - www.chrysis.net
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