Fast autofocus plus stunning G Master resolution and gorgeous bokeh in a lightweight, well-balanced, mobile lens. Sony's original XA lens and XD linear motor technologies contribute to peak optical and mechanical performance, making it possible to capture dynamic, eye-catching images from afar. Ideal for sports, news, and nature photography.

Two XD (extreme dynamic) linear motors provide fast, precise AF and reliable tracking. The 600mm f/4 GM OSS brings out the best in modern camera bodies, effortlessly maintaining accurate focus on fast-moving sports and wildlife subjects. A control algorithm developed specifically for these motors contributes to fast positioning of the large focus group with minimum delay and vibration.

An exacting G Master optical design employs three fluorite elements to suppress chromatic aberration that can be a problem in telephoto lenses. A large XA (extreme aspherical) element is also included to eliminate onion-ring bokeh. Each lens is individually calibrated to achieve the ideal balance between resolution and bokeh. Optional high-performance 1.4x and 2.0x teleconverters with XA elements are also available.

A dust- and moisture-resistant design provides the reliability needed for outdoor use in challenging conditions, and the front lens element features a fluorine coating that repels water, oil, and other contaminants. A rigid magnesium alloy is used not only for the lens barrel exterior and tripod mount area, but critical areas of the barrel interior as well, for maximum strength and durability.

When the ''FULL TIME DMF'' switch is ON, manual focus is automatically engaged when the focus ring is operated, even in the AF-C mode. Built-in Optical SteadyShot image Stabilization includes ''MODE 2'' for panned shots, and ''MODE 3'' for dynamic sports or wildlife action. ''MODE 3'' also provides a more stable viewfinder image for easier framing.

Supplied Accessories: Hood (model): ALC-SH158 - Lens front cap - Lens rear cap: ALC-R1EM - Hard case - Lens strap - Case strap