EF-Mount Lens/Full-Frame Format
Aperture Range: f/4 to f/22
Four Aspherical Elements
Air Sphere and Fluorine Coatings
Ring-Type Ultrasonic Motor AF System
Optical Image Stabilizer
Weather-Sealed Construction
Rounded 10-Blade Diaphragm
The Canon EF 24-105mm f/4L IS USM was originally designed to complement Canon's first enthusiast full-frame camera, the EOS 5D, and combines a useful standard zoom range, a constant maximum aperture, good optical quality and effective image stabilization. Optical construction includes one Super-UD glass element and three aspherical lenses to minimize chromatic aberration and distortion. Canon's ring-type USM gives silent but quick AF, along with full-time manual focus. Like Canon's high-end DSLRs, this lens is also dust and moisture-resistant.