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.

Sony has unveiled two lenses for its full-frame cameras, covering wide-angle and telephoto extremes between them. The headline-grabbing lens is the FE 400-800mm F6.3-8 G OSS, because it's Sony's first ...

Flare is one area where diffractive elements could have a negative effect, but by facing the diffraction gratings against each other, Canon seems ... just -0.3 EV. An 800mm lens is difficult ...

The Sony FE 400-800mm f/6.3-8 G OSS is smaller than expected for an 800mm with an internal zoom. Here’s what I learned at The Photography & Video Show ...

Canon is developing lenses in the following focal lengths: RF 400mm f/4.0, RF 500mm f/5.6, RF 600mm f/5.6, RF 600mm f/6.3, and RF 800mm f/6.3. The design is focused on creating lightweight yet ...

Find out more about how we test. Comparable in many respects to Canon’s RF 200-800mm F6.3-9 IS USM, Sony’s super-telephoto is a win for capturing wild and winged creatures. It's less effective ...

Canon’s comparable zoom weighs only 4.5 pounds, but the Canon RF 200-800mm f/6.3-9 IS USM has a wider range. The other cost beyond that added weight is the literal cost. The Sony FE 400-800mm f ...