• Large aperture medium telephoto lens for APS-C sensors • 10 lens configurations in 9 groups including ED lenses reduce chromatic aberration and achieve good image quality. The barrel and attached hood are made of textured metal, and the focusing ring is comfortable to operate • Excellent AF Performance: Uses STM (stepping motor) + lead screw type drive system for smooth and quiet autofocus. Capture the definitive moment easily and support smooth video shooting and eye AF Video AF and eye AF are only compatible with cameras equipped with high performance image phase AF • (Supports firmware updates) The rear cap has a USB terminal, so you can connect it to a PC for firmware updates. (Not Mac compatible) • Manufacturer Warranty: 2 years (Subject to natural failures)