Canon has filed a new patent in Japan. The application is for RF 24-70mm f/2.8L lens designed for Canon full frame mirrorless camera system. This lens is very similar to the RF 28-70mm f/2L USM and will probably 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 24-70mm f/2.8L. Check it out!
Canon RF 24-70mm f/2.8L Lens Patent
Canon RF 24-70mm f/2.8L Lens Patent Specifications:
- Focal Length: 24.69mm 37.63mm 67.88mm
- F-Number: 2.91 2.91 2.91
- Half angle of view (degrees): 41.23 29.90 17.68
- Total length of zoom lens (mm): 139.21mm 150.29mm 171.74mm
- Backfocus: 13.49mm 22.31mm 35.10mm
The RF 24-70mm f/2.8L USM is expected to be announced sometime in 2019, maybe even as soon as CP+ in February.
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via: USPTO
