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Canon Patent Application: Canon 400mm F8.0
This is a curious patent describing the 600mm and 800mm F11's. While that's not particularly interesting it seems that Canon may have another of these lenses in mind, a 400mm F8. Of course with all these patents, the embodiments don't necessarily mean something is going to get created, however, it's a curious addition, and I'm sure there would be some interest in a slightly faster compact 400mm.
Focal length 412.00
F number 8.24
Half angle of view 3.01
Image height 21.64
Lens total length 189.54
Canon Patent Application 2020-173350
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