Canon Patent Application: Canon RF telephoto zoom lenses

It's not surprise that Canon is throwing its engineering might behind the Canon RF mount.  We have discovered countless patents dealing with the RF mount as Canon moves the company's focus to the new mount.

This week isn't much different, another Canon patent application discussing, in this case, various telephoto zooms.  What's curious is the amount of 100-500mm lenses in this patent, and none of them got chosen as the final lens.  Ironically, I think that most of the people that read this article would rather have the 100-500's listed here.

Canon RF 100-500mm F6-6.3

focal length         102.00   220.29   485.00  
F number               6.00     6.43     6.43  
Half angle of view    11.98     5.61     2.55  
Image height          21.64    21.64    21.64  
total lens length    208.69   259.83   288.69  
BF                    16.13    32.43    46.87  

Canon RF 100-500mm F5.0 - F6.3

focal length         102.00   220.00   450.00  
F number               5.24     5.75     6.43  
Half angle of view    11.98     5.62     2.75  
Image height          21.64    21.64    21.64  
Total lens length    198.35   249.94   278.35  
BF                    14.56    30.77    41.71  

Canon RF 70-300mm F3.5-F5.6

focal length          72.86   133.96   289.00  
F-number               3.75     4.66     5.83  
Half angle of view    16.54     9.17     4.28  
Image height          21.64    21.64    21.64  
Lens length          162.01   202.44   237.12  
BF                    13.80    31.02    57.79  

Canon RF 80-250mm F4 - F5.6

Focal length          78.53   128.75   249.96  
F number               4.16     4.65     5.83  
Half angle of view    15.40     9.54     4.95  
Image height          21.64    21.64    21.64  
Total lens length    162.07   193.14   217.22  
BF                    12.47    21.78    39.35  

Canon RF 100-500mm F5.6-F6.3

Focal length         102.00   220.00   485.00  
F number               5.69     6.14     6.43  
Half angle of view    11.98     5.62     2.55  
Image height          21.64    21.64    21.64  
Total lens length    213.16   266.00   293.16  
BF                    11.09    26.50    42.04  

Canon RF 100-500mm F5-F6.3

focal length         102.00   219.99   450.00  
F-number               5.25     5.78     6.43  
Half angle of view    11.98     5.62     2.75  
Image height          21.64    21.64    21.64  
Total lens length    198.63   250.02   278.63  
BF                    14.61    32.10    43.74  

Japan Patent Application 2020-064176

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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