|
When you purchase through links on our site, we may earn an affiliate commission. Here's how it works. |
It looks like Canon is indeed working on their RF mount super telephoto optical formulas. We were told a couple of days ago that an RF 500mm f/4L IS would be the first super telephoto lens launched for the EOS R system.
A USPTO patent has appeared that shows optical designs for an RF 400mm f/2.8L IS, RF 500mm f/4L IS and an RF 600mm f/4L IS.
Canon RF 400mm f/2.8L IS USM
- Focal length: 392mm
- F number: 2.9
- Angle of view: 3.16°
- Image height: 21.64mm
- Entire lens length: 360mm
- Backfocus: 31mm
Canon RF 500mm f/4L IS USM
- Focal length: 490mm
- F number: 4.12
- Angle of view: 2.53°
- Image height: 21.64mm
- Entire lens length: 412mm
- Backfocus: 33mm
Canon RF 600mm f/4L IS USM
- Focal length: 588mm
- F number: 4.12
- Angle of view: 2.11°
- Image height: 21.64mm
- Entire lens length: 476mm
- Backfocus: 33mm
