The FE 400-800mm F6.3-8 G OSS is Sony's first α Lens that zooms to 800mm; a range that is ideal for distant subjects and telephoto compression. The fast, precise AF lets you capture unpredictable subjects with accuracy and precision. The internal zoom design minimizes center-of-gravity shift for smooth handling. The first1 α series super-telephoto zoom lens to cover the 400 to 800 mm range High resolution and natural bokeh throughout the zoom range Internal zoom for stable handling Fast, precise AF captures even fast-moving subjects High-performance 1.4x and 2.0x teleconverters extend the lens's focal length Durable for tripod-mounted shooting and mount to UNC standard 1/4-20, or 3/8-16 screws Optical SteadyShot stabilization, with mode switch New lens hood designed with a lock button and filter opening Dust and moisture resistance plus high durability Minimal focus breathing for movies Features Zoom to 800 mm for the beauty beyond the reach of the naked eye The FE 400-800mm F6.3-8 G OSS is Sony's first1 α Lens that zooms to 800 mm, with a range that is ideal for distant subjects as well as the creation of telephoto compression. The fast, precise AF lets you capture subjects that can't be approached closely, such as wild birds and wild animals, and draw them into the full picture. The internal zoom design minimises center-of-gravity shift for smooth handling. Super-telephoto zoom The FE 400-800mm F6.3-8 G OSS is the first1 α Lens to cover a 400 mm to 800 mm super-telephoto range. An optional 2x teleconverter can extend maximum focal length to 1600 mm. The internal zoom means the length of the lens does not change, and the centre of gravity stays within a small range for stable handling. Smooth, easy zoom ring rotation allows precise zooming, while careful design prevents accidental focal length changes. Cutting-edge optical design Six ED (Extra-low Dispersion) glass elements effectively control chromatic aberration. Flare and ghosting in backlit conditions are also thoroughly suppressed. An 11-blade circular aperture helps to create beautiful ball bokeh amid exceptionally smooth, creamy background bokeh when shooting with a narrow depth of field. Fast, precise AF captures even fast-moving subjects Two precision linear motors drive the lens's focus group for fast, accurate focusing. Tracking easily keeps up with the 120 fps2 maximum burst speed of the α9 III, and continues uninterrupted even while zooming so important moments are not lost. A focus-range limiter (FULL / 10m-NEAR / ∞-8m) can be used to optimize operation for different subject distances. Focus breathing is suppressed for refined movie quality and quiet operation expands the gamut of possible applications. Solid support for handheld or tripod-mounted shooting The optically stabilised FE 400-800mm F6.3-8 G OSS extends to 800 mm, but weighs just 2475 g (87.4 oz) and can be used handheld without shake-induced blur. Stabilization is even better with an α body that includes image stabilization. When using a tripod, the mount foot can be quickly rotated for horizontal or vertical orientation. Durable components, optimized balance, and a non-removable foot maximize reliability and performance. High-level control and reliability for any situation Three focus hold buttons at 90° increments around the barrel allow easy access in any orientation. Other functions can be assigned to the buttons as needed. Internal zoom and a dust/moisture resistant3 design maximize reliability. The front element has a fluorine coating that repels contaminants and makes the lens easier to clean. The lens hood is a new design with a lock button and filter opening for easy operation. Lens Configuration Impeccable Sony G Lens design emphasises a graceful balance between high resolution and gorgeous background bokeh that can enhance the artist's vision.