Features:
	
Compact, high performance L-series super-telephoto zoom makes it ideal for sports and wildlife photography.
	
One fluorite and one super UD lens element provides excellent correction of chromatic aberration throughout the entire zoom range, helping to deliver high-quality images with high resolution and contrast.
	
Rotation-type zoom ring allows for more precise composition and excellent balance when handholding.
	
Inner focusing, ring USM, a high-speed CPU and optimized AF algorithms for fast and accurate autofocusing.
	
Optical Image Stabilizer provides up to four shutter speed steps of correction*.
	
Three image stabilization modes (standard, panning, and during exposure only) provide outstanding results for a wide range of shooting situations.
	
Improved zoom torque adjustment ring allows easy setting of zoom tension.
	
Highly resistant to dust and water, and amazing durability enabling shooting even in harsh conditions.
	
Circular aperture (9 blades) helps deliver beautiful, soft backgrounds.
	
Fluorine coating on front and rear lens surfaces helps reduce smears and fingerprints.
	
Lens hood with side window permits specialty filters to be adjusted with hood in place.
	
Newly designed tripod mount can be attached or detached without removing the lens from the camera.
	
Minimum focusing distance of 3.2 ft. / 0.98 m with 0.31x maximum magnification.
 
Focal Length & Maximum Aperture
100-400mm 1:4.5-5.6
Lens Construction
21 elements in 16 groups
Diagonal Angle of View
24°-6°10'
Focus Adjustment
Inner focus system / USM
Closest Focusing Distance
3.2 ft. / 0.98m
Zoom System
Rotation Type
Filter Size
77mm
Max. Diameter x Length, Weight
Approx: 3.7 x 7.6 / 94 x 193mm
Approx. 3.46 lbs./1570g (without tripod mount)
Approx. 3.62 lbs./1640g (with tripod mount)