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Canon Patent Application: Collection of RF Primes
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Canon Patent Application: Collection of RF Primes

It's been a while since we've seen a new lens patent from Canon. The initial flurry of patent applications during the initial development of the RF system seems to have died off.  This could mean we get more targetted patent applications such as this one.

This patent application focuses (literally) on reducing the weight of the focus element group and suppressing aberrations while doing so.  Canon submitted the application with the following embodiments.

Are these lenses coming? Some of them certainly may.  It's hard to say if Canon makes a complete line of F1.2's that they'll do the same for F1.4, but I suspect we'll see a Canon RF 50mm F1.4 sooner than later.

Canon RF 24mm F1.4

Focal distance      24.00   
F number             1.40   
Half field angle    42.03   
Image height        21.64   
Length of Lens     120.00
BF                  15.00

Canon RF 24mm F1.8

Focal distance      24.00   
F number             1.80   
Half field angle    42.03   
Image height        21.64   
Length of Lens     110.00
BF                  15.06

Canon RF 50mm F1.4

Focal distance      50.00 
F number             1.40 
Half field angle    23.40 
Image height        21.64 
Length of Lens     100.00

​Canon RF 28mm F1.8

Focal distance      28.00   
F number             1.80   
Half field angle    37.69   
Image height        21.64   
Length of Lens     100.00 
BF                  15.85

Canon RF 35mm F1.8

Focal distance      35.00   
F number             1.80   
Half field angle    31.72   
Image height        21.64   
Length of Lens     100.00   
Back Focus          15.00

Canon Patent Application 2021-018277


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