Canon Japan has just filed a new super telephoto prime lens patent for EF 1000mm f/5.6 DO lens.
Patent Publication No. 2016-102852
Published 2016.6.2
Filing date 2014.11.27
Example
Zoom ratio 1.00
Focal length 950.00
F-number 5.80
Angle of view 1.30
Image height 21.64
Overall length of the lens 485.94
BF 0.40
Patent of Canon
Positive and negative Shibomake
Diffractive optical element (first group)
Inner focus (the second group)
via: EG
Read More: Canon Rumors
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