No, that accolade went to Canon with its RF 200-800mm F6.3-9 IS USM in 2023. There's plenty going for the 400-800mm lens, mind. Sony says it is dust-resistant and moisture-resistant, plus its focusing ...

While the RF 200-800mm f/6.3-9 IS is not a Canon ‘L’ lens it does have the white livery and it is weather-sealed too. It comes with a deep lens hood and a non-Arca press foot.

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 ...

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It’s a large lens, but internal zoom ... 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.

SAN DIEGO, Feb. 26, 2025 /PRNewswire/ -- Sony Electronics introduces the 400-800mm F6.3-8 G OSS (SEL400800G), its longest-range full-frame E-Mount lens to datei, setting a new benchmark in focal ...

The Sony FE 400-800mm F6.3-8 G OSS is a big but manageable telephoto zoom for wildlife photography, although a slow maximum ...

including Canon's, and there's potential for dust and moisture to enter the lens through its extending barrel. Not so with Sony's 400-800mm. This is an optically complex lens too, comprising 27 ...