Another patent application for a Canon RF 24-70mm f/2.8L IS has appeared within what appears to be a patent for the RF 28-70mm f/2L.
From Japan Patent Application 2019015956:
- Focal length: 24.69 37.63 67.88
- F-number: 2.91 2.91 2.91
- Half angle of view: 41.23° 29.90° 17.68°
- Image height: 21.64 21.64 21.64
- Lens total length: 139.21 150.29 171.74
- BF: 13.49 22.31 35.10
Canon has already let us know that they're hard at work on the “holy trinity” of pro zoom lenses for the RF mount. We expect all three lenses to be announced in 2019.
Some of our articles may include affiliate links. If you purchase through these links, we may earn an affiliate commission at no extra cost to you.
Read paragraph 0055, and then look at drawings 1, 3, 5, 7, and 9. L4/Ln is the optional IS group.
Huh. Seems strange IS would be "optional" to the design. AND it also seems strange that looks to be where the iris is. But what do I know—zero experience in designing lenses…..