That may become a killer lens if it ever goes to production. Canon files a patent for a n EF 600mm f/4 IS DO lens. “DO” stays for diffractive optics.
Will this lens eventually replace the existing EF 600mm f/4L IS II? Not necessarily. DO optics are usually of smaller size than their counterparts without DO, so the lens referred in the patent could well be an addition to the line-up.
- Patent publication number 2016-200685
- Release date 2016.12.1
- Application date 2015.4.9
- Example 1
- Focal length 585.00
- F number 4.12
- Half angle of view (degree) 2.12
- Image height 21.64
- Lens total length 335.32
- BF 66.92