Sony FE 400-800mm F6.3-8 G OSS Review: 800mm Reach Without the Exotic Price
Before this lens, getting to 800mm on Sony meant a prime costing as much as a car, or a teleconverter on the 200-600mm. The Sony FE 400-800mm F6.3-8 G OSS, announced on February 26, 2025 at $2,899.99, puts the whole range in one zoom. It weighs 2,475 grams and measures 346mm long.
The zoom is internal, so the lens doesn’t grow as you zoom and the balance stays the same on a tripod or monopod. Two linear motors drive the focus, and the lens supports 120 frames per second bursts on the Sony A9 III.
Long telephotos are for subjects you can’t approach: shy animals at the edge of a forest, birds across a lake, wild boar that will vanish if you take one step closer.
Photo: Media Instances
Dustin Abbott’s review tests the lens in the field, including with teleconverters.
Video review: Dustin Abbott
Design
The optical formula is 27 elements in 19 groups, including six ED elements. The aperture has 11 rounded blades and runs from f/6.3 at 400mm to f/8 from about 600mm up. The front filter thread is 105mm, but the hood has a lockable drop-in filter slot, which is the practical way to use a polarizer or ND.
Close focus ranges from 1.7 meters at 400mm to 3.5 meters at 800mm, for 0.23x magnification. That’s enough for dragonflies and flowers from a distance.
Controls include an AF/MF switch, a full-time DMF switch, a three-position focus limiter and three custom buttons. The stabilization has an on/off switch and three modes. The tripod collar rotates quickly, but the foot doesn’t come off and isn’t Arca-Swiss compatible, which PetaPixel flagged. The lens is sealed against dust and moisture and works with Sony’s 1.4x and 2x teleconverters, reaching 1600mm.
How it performs
PetaPixel found it sharp across the range, even wide open, and Lenstip praised the center sharpness and the efficient stabilization. PetaPixel also found autofocus faster and more reliable than on the 200-600mm, with good control of color fringing and strong contrast.
The weaknesses come with the design. It’s heavy and long, and handholding it all morning takes stamina. f/8 from 600mm means high ISO at dawn and dusk. Lenstip saw flare and ghosting against bright light, and PetaPixel noted bokeh with visible onion rings in highlights and some purple fringing at 800mm. Starting at 400mm is also limiting when an animal comes closer than expected.
Who it’s for
Bird and wildlife photographers on Sony who want 800mm without buying a prime. Lenstip called the price-to-performance ratio good. On a high-resolution body like the Sony A7R V or a fast one like the A1 II or A9 III, it makes a serious wildlife kit.
The alternatives are cheaper and lighter. Sony’s own 200-600mm with a 1.4x teleconverter reaches 840mm at f/9 for less, as Lenstip pointed out. The Tamron 150-500mm is far easier to carry. We compare the main options in our Sony wildlife lens guide. Canon shooters get similar reach from the RF 200-800mm. For working with a lens this size, see our telephoto fieldcraft guide.