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Canon Patent Application: Canon RF 100mm F2.8 Macro
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Canon Patent Application: Canon RF 100mm F2.8 Macro

The Canon EF 100mm F2.8 was a standard go-to macro lens, and even for portraiture for many photographers.

Canon clearly is going to come out with a full 1:1 Macro for the RF mount, it's simply a matter of time.  This patent application shows such a lens.  It certainly does not try to simplify the optical formula as the patent application details a fairly complicated element design.

A lot of the embodiments have far too short of a back focus distance to be actually practical, but there are a few that are far more likely to be used for the RF mount.

Focal length            100.56  
F number                  2.88  
Half angle of view (°)   10.96  
Lens total length       161.85  
BF                       15.26  
Focal length            100.00  
F number                  2.88  
Half angle of view (°)   11.02  
Lens total length       166.36  
BF                       15.78  

Canon Patent Application 2020-204744

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