Flare is one area where diffractive elements could have a negative effect, but by facing the diffraction gratings against each other, Canon seems to have avoided the problem. There is no sign of ...

Canon’s response with this RF 200-800mm f/6.3-9 IS USM is very positive, although we will have to wait to see how good this response is in time when we get to review it fully.

The rumor site has quite rightly likened it to the Canon RF 200-800mm f/6.3-9 IS USM, which my colleague, Gareth Bevan, reviewed very favorably. Sony Alpha Rumors revealed that the patent lists ...