Canon has pushed into some new territory with the RF mount, and they show no signs of slowing down, as seen by the testing of several very fascinating lenses just completed.
According to Canon Rumors, Canon is currently testing five new DO super-telephoto lenses, including:
- RF 400mm f/3.5 DO IS USM
- RF 400mm f/4 DO IS USM
- RF 500mm f/4.5 DO IS USM
- RF 500mm f/5 DO IS USM
- RF 800mm f/9.5 DO IS USM
Canon has previously developed DO (diffractive optics) lenses, which make use of unique lens components that allow for more compact and lightweight designs. The Canon EF 400mm f/4 DO IS II USM was the most renowned example of this. While the first version of this lens garnered mixed reviews owing to concerns with sharpness, the second version considerably improved on these issues and became a huge hit. Furthermore, while it is unclear which of these lens designs will make it to market (rumor has it that only one will), it is likely that its announcement (whether it is a full announcement or just development) will coincide with the announcement of the upcoming EOS R1 flagship mirrorless camera, which is expected to be released in late 2015. If I had to guess, the RF 500mm f/4.5 would be the most probable candidate, given that Canon already has two RF 800mm lenses and the 400mm f/2.8, and the EF 500mm f/4 L has not yet been replaced by a new lens. We’ll see what the rest of the year has in store!