Canon 200-400mm f/4L IS USM Ext 1.4x Lens

Telephoto zoom lens with a 200-400mm focal length and built-in 1.4x extender
f/4 aperture for low-light photography and shallow depth of field
Advanced Image Stabilization (IS) for reduced camera shake and blur
USM (Ultrasonic Motor) for fast and quiet autofocus
High-quality optics with 33 elements in 24 groups
Fluorite and Super UD lens elements for improved image quality
Air Sphere Coating (ASC) for reduced ghosting and flaring

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