Canon has filed a new patent in Japan. The application is for RF 90mm f/2.8L IS Macro lens designed for Canon full frame mirrorless camera system. This lens will likely be a new 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 90mm f/2.8L IS Macro lens. Check it out!
Canon Patent for RF 90mm f/2.8L IS Macro Lens
Specification and lens arrangement of embodiment 3
- Focal length: 86.00mm
- F number: 2.87
- Half angle of view: 14.12
- Image height: 21.64mm
- Lens length: 115.07mm
- Back focus: 15.93mm
Specification and lens arrangement of embodiment 1
- Focal length: 97.00mm
- F number: 2.92
- Half angle of view: 12.57
- Image height: 21.64mm
- Lens length: 115.12mm
- Back focus: 20.01mm
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