Canon Patent Application: Canon RF Lenses
Canon has been applying for many patents on the RF system - which makes sense, they were starting from scratch and making an entirely new system. They probably threw every engineer they had into the process. A lot of designs probably won't ever get developed, but some may be the basis of lenses we see in the future. A really necessary element of Canon RF lenses, that hasn't yet appeared is macro photography lenses.
This patent application deals with high-speed focusing and keeping the aberrations low. In it, details several intriguing macro lenses some of them we have similar models on the EF mount. I do believe these are 1:1 macros, I think that's what β = -1.0 is, but if someone can confirm that, I'd be more than happy. ;)
Canon RF 100mm F2.8 Macro
Focal length 97.62
F number 2.92
angle of view 12.50
Image height 21.64
lens length 123.21
BF 18.86
Canon RF 90mm F2.8 Macro
Focal length 87.04
F number 2.92
angle of view 13.96
Image height 21.64
lens length 135.86
BF 19.58
Canon RF 180mm F2.8 Macro
focal length 189.96
F number 2.92
angle of view 6.50
Image height 21.64
lens length 185.34
BF 23.95
Canon RF 65mm F2.8
Focal length 65.13
F number 2.92
angle of view 18.38
Image height 21.64
lens length 135.78
BF 21.40
Japan Patent Application 2020-060661
Japan Patent Application 2020-060660 from Canon seems to be more of the same, with various designs of lenses that are high in magnification (β > -.50). The designs in this patent application, seem to fixate more around a 100mm focal length with designs such as this;
focal length 95.36
F number 2.92
angle of view 12.78
Image height 21.64
total length 125.16
BF 15.84
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Richard 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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