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

Telephoto zoom lens with a 100-400mm focal length
f/4.5-5.6 aperture for low-light photography and shallow depth of field
Image Stabilization (IS) for reduced camera shake and blur
USM (Ultrasonic Motor) for fast and quiet autofocus
High-quality optics with 17 elements in 14 groups