Sony's affordable super-telephoto zoom — 400-800mm with G-series optics and OSS for wildlife on a budget.
The Sony FE 400-800mm f/6.3-8 G OSS was released in February 2025 as Sony's longest-reach native FE zoom, covering 400-800mm with optical SteadyShot (OSS) stabilisation. G-series designation — not G Master. At 2,475g and 105mm filter thread it is a substantial super-telephoto zoom. 27 elements in 19 groups including 6 ED elements. Eleven circular aperture blades. Variable aperture from f/6.3 at 400mm to f/8 at 800mm.
The optical design uses 27 elements in 19 groups including 6 ED elements. Eleven circular aperture blades. The 105mm filter thread is large-diameter. At 2,475g the lens is substantial. Minimum focus distance of 1.7m at 400mm (3.5m at 800mm). OSS optical stabilisation — no official stop figure from Sony; independent review testing measured approximately 4 stops at 800mm. Variable aperture from f/6.3 to f/8.
The 400-800mm range covers the extreme end of wildlife telephoto focal lengths from a single zoom: 400mm for medium-distance birds in flight and mammals, 800mm for distant subjects requiring the maximum telephoto reach available in a native Sony FE zoom. The f/8 at 800mm is the practical lighting constraint — outdoor daylight is required for sufficient shutter speed at the extreme telephoto end. G-series (not GM) means no XA elements, which affects wide-open aberration correction relative to GM standards.
On the used market the Sony FE 400-800mm f/6.3-8 G OSS is a February 2025 product with very limited used availability. Condition checks: OSS engagement, AF motor response, 105mm front element for marks, and zoom ring smoothness across the 2x zoom range. G-series — not compatible with Sony teleconverters (unlike some GM super-telephotos). Compatible with all Sony FE-mount full-frame and APS-C E-mount bodies.