Canon Patent Application: Super telephotos

Canon has filed another patent on super telephoto primes.  I suspect that many patents go into making the next version of super telepotos and that the work is pretty extensive.  These appear to be EF super telephotos as well, because they have a significantly large back focus distance normally associated with the EF mount, versus the RF mount.  We have seen specific super telephoto patents for the RF mount, and the supertelephotos take advantage of Canon's short backfocus distance with the RF mount. 

I see that one site is claiming these are possibly RF mount super telephotos.  A patent for supertelephotos looking like this, with a shorter than EF mount back focus distance, clearly indicates an RF mount design, whereas this patent application shows a larger backfocus distance associated with the EF mount designs.

I'm not sure these designs would make it into production, they seem to be pretty simplistic and also lack the elements that Canon usually has in their super telephotos for image stabilization.

Canon EF 800 F4.0

Focal length: 778.44 mm
F-Number: 5.80
Angle of View: 1.59
Image height: 21.64 mm
Lens length: 489.01 mm
Back focus: 48.66 mm

Canon EF 600 F4.0

Focal length: 584.99 mm
F-number: 4.12
Angle of View: 2.12
Image height: 21.64 mm
Lens length: 476.28 mm
Back focus: 87.97 mm

Canon EF 500 F4.0

Focal length: 489.05 mm
F-Number: 4.12
Angle of View: 2.53
Image height: 21.64 mm
Lens length: 411.08 mm
Back focus: 86.24 mm

Canon EF 400 F2.8

Richard CanonNewsRichard CanonNews

Richard has been using Canon cameras since the 1990s, with his first being the now legendary EOS-3. Since then, Richard has continued to use Canon cameras and now focuses mostly on infrared photography. Richard is the founder and editor of CanonNews since 2017, and has worked as a writer on CanonRumors and other websites in the past.

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