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Canon Patent Application: 600mm F4 DO Supertelephoto
Canon has applied for another patent application dealing with diffractive optics. This patent application is for a 600 F4 Supertelephoto diffractive optics lens. This appear to be EF lens designs, and not RF, as the back focus is larger than 44mm. However, for super-telephotos, either mount could be used as the final lens design.
Canon has shown off a prototype of the 600mm DO Supertelephoto for years now, sooner or later it's bound to show up.
Focal length 585
F-Number 4.12
Half angle of view 2.12
Image height 26.4
BF 70.86
US Patent Application 20180259690
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