For definitive long-shot precision and spectacular portraits even in low light, this professional G-Series lens raises the standard of DLSR performance. Its 35mm-equivalent 450mm focal length and ultra-bright f2.8 aperture combine for superb results in virtually any light -- and its high-speed SSM (Super Sonic wave Motor) auto-focus is fast, accurate and quiet.  A strong, light magnesium lens barrel makes shooting more comfortable even on long wildlife or sports assignments.

Features:

• Fast, f2.8 aperture
• Lightweight design
• Supersonic Wave Motor:  A built-in lens motor for faster automatic focusing with high torque at low speed, quick start/stop response, and quiet, smooth operation
• Extra-Low Dispersion Glass: Three precision ED Glass lenses correct chromatic aberrations to provide extremely sharp telephoto images distant subjects as well as dramatic sports close-ups
• Internal Focusing System moves only the internal lens elements, so the overall length does not change -- creating a zoom lens that focuses more quickly and doesn’t affect the balance of your camera
• 2 Direct Manual Focus Modes allow you to quickly revert to manual focus by just turning the manual focus ring of the lens
• Versatile Focus Hold places four focus hold buttons in different lens locations, plus electronic slider focus range selector switch

Includes:

• Front and rear lens cap
• SH0012 petal lens hood
• Lens carrying case

• Aperture (Max.) : f/2.8
• Aperture (Min.) : f/32
• Aspheric Elements : no aspheric
• Blades : 9 aperture blades
• Distance Encoder : Yes
• Distance Scale : Yes
• Filter Diameter : 42mm (internal)
• Focal Length : APS: 450mm (35mm Equivalent: 300mm)
• Focal Length : APS: 450mm (35mm Equivalent: 300mm)
• Lens Groups-Elements : 12 groups, 13 elements
• Lens Type : Telephoto & Telephoto Zoom
• Magnification : x 0.18
• Minimum Focus Distance : 6' 7” (2.0m)
• Non-rotating Focusing Ring : Yes
• SSM Focusing : Built-in
• Tele-converter Compatibility - 1.4x : Yes
• Tele-converter Compatibility - 2.0x : Yes
• Focus-hold Button : Yes
• Focus-range Limiter : Yes

• Dimensions (Approx.) : 5 13/16 x 9 3/8” (122 x 242.5mm)
• Weight (Approx.) : 5lbs 1oz (2300g)