Sony FE 400-800mm F/6.3-8 G Lens (SEL400800G)

A Super-Telephoto Zoom
The Sony FE 400-800mm F6.3-8 G OSS is a full-frame super-telephoto zoom lens made for Sony E-mount cameras. It is designed for wildlife, birding, sports, and other long-reach subjects, with a zoom range that runs all the way to 800mm. The constant internal zoom design keeps the lens length stable while you zoom.

Built for Long Reach
This lens uses a variable aperture of f/6.3-8, and Sony says it can be extended to 1600mm with an optional 2x teleconverter. It also includes Optical SteadyShot for better handheld stability and a fast, accurate autofocus system for tracking distant subjects. The 11-blade circular aperture helps produce smooth background blur.

Designed for Field Use
At about 2.47 kg, it is substantial but still practical for a lens in this class. The internal zoom design helps balance handling, while the white exterior, tripod collar, and weather-resistant construction make it suitable for outdoor shooting. Sony also includes fluorine coating on the front element to help resist dirt and smudges.

Optical Performance
The optical design uses 27 elements in 19 groups, including six ED glass elements to help control chromatic aberration. Sony also uses coatings to reduce flare and ghosting in backlit situations. That combination is aimed at keeping detail and contrast strong across the zoom range.

Key Features at a Glance

• Focal length: 400-800mm.

• Maximum aperture: f/6.3-8.

• Minimum aperture: f/36-45.

• Lens construction: 27 elements in 19 groups.

• Minimum focus distance: 1.7 m at wide end, 3.5 m at tele end.

• Maximum magnification: 0.23x.

• Diaphragm blades: 11.

• Filter size: 105 mm.

• Weight: about 2,475 g.

• Mount: Sony E-mount.

A Strong Choice for Distant Subjects
The Sony FE 400-800mm F6.3-8 G OSS is a serious telephoto option for photographers who need extreme reach in a zoom lens. It is especially well suited to wildlife and bird photography, where flexibility and subject distance matter most.