Overview

Canon’s breakthrough multi-layer diffractive optical lens technology provides photographers with superior super-telephoto performance in a smaller and lighter design with enhanced correction for chromatic aberrations. We’ve also added our highly effective Image Stabilization system that gives the equivalent effect of a shutter speed two stops faster. And, it’s built to our professional standards with fast AF, full-time mechanical focus and dust and water-resistant construction. - EF 400mm f/4 DO IS USM Super Telephoto

Features:

• The multi-layer diffractive optical element effectively corrects chromatic aberrations prone to occur in super telephoto lenses. It provides high image quality while maintaining compactness and light weight
• The image stabilizer gives the equivalent effect of a shutter speed two stops faster. The lens also has a second image stabilizer mode that is optimized for following shots of moving subjects
• Ultrasonic motor (USM) for quick and quiet autofocusing
• Manual focusing is available after the subject comes into focus in autofocus mode (ONE SHOT AF)
• The AF stop button for stopping the AF operation at anytime
• The lens is compatible with Extender EF1.4X II and EF2X II
• Tight seal structure ensures excellent dust-proof and drip-proof performance
• Designed for lighter weight with major parts made of magnesium alloy