Canon EF 100-400mm f/4.5-5.6L is II USM Lens

Compact, high performance L-series super-telephoto zoom makes it ideal for sports and wildlife photography Rotation-type zoom ring allows for more precise composition and excellent balance when handholding Improved zoom torque adjustment ring allows easy setting of zoom tension New Air Sphere Coating (ASC) helps to significantly reduce backlit flaring and ghosting Highly resistant to dust and water, and amazing durability enabling shooting even in harsh conditions

Compact, high performance L-series super-telephoto zoom makes it ideal for sports and wildlife photography
Rotation-type zoom ring allows for more precise composition and excellent balance when handholding.Rounded 9-Blade Diaphragm
Improved zoom torque adjustment ring allows easy setting of zoom tension, Focal Length & Maximum Aperture:100-400mm 1:4.5-5.6, Closest Focusing Distance-3.2 ft. / 0.98m
New Air Sphere Coating (ASC) helps to significantly reduce backlit flaring and ghosting, Highly resistant to dust and water, and amazing durability enabling shooting even in harsh conditions