Canon has filed a new patent in Japan. The application is for RF 24-80mm f/4L IS USM lens designed for Canon full frame mirrorless camera system. This lens is another kit alternative for the next EOS R full frame mirrorless cameras.
EOS R is the first camera to feature the RF lens mount with a 12-pin connection, flange back distance of 20mm and a wide 54mm mount diameter enabling even greater flexibility in lens design. The first four Canon RF lenses are the RF 24-105mm f/4L USM, RF 28-70mm f/2L USM, RF 35mm f/1.8 M IS, RF 50mm f/1.2L USM. All four lenses have customizable control rings.
In this patent, Canon shows an optical formula for a RF 24-80mm f/4L IS USM. Check it out!
Canon Patent for RF 24-80mm f/4L IS USM Lens
Canon RF 24-80mm f/4L IS
- Focal length 24.72 48.09 82.45
- F number 4.12 4.12 4.12
- Half angle of view 41.19 24.22 14.70
- Image height 21.64 21.64 21.64
- Lens overall length 119.50 134.52 149.55
- BF 13.50 18.71 22.73
Canon RF 24-105mm f/4L IS
- Focal distance 24.72 63.46 131.00
- F number 4.12 4.12 4.12
- half field angle (degree) — 41.19 18.83 9.38
- Image height 21.64 21.64 21.64
- length of the lens 137.50 168.92 200.33
- BF 13.50 24.03 28.27
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