Canon 24-105mm IS f4
IS Optical Image Stabilizer allows use of shutter speeds up to 3-stops slower with no perceptible increase in image blur.
f/4 aperture over the full focal length range, operators can set exposure at the widest aperture and zoom through to 105mm without slowing shutter speed.
Constructed with one Super-UD glass element and three aspherical lenses, this lens minimizes chromatic aberration and distortion. The result is excellent picture quality, even at wide apertures.
Ring USM (Ultrasonic motor) uses ultrasonic frequency vibrations to drive responsive, near-silent high speed auto focus. Good holding torque stops the focusing lens group with precision without overshoot. Full time manual focus override is available without having to switch out of AF.
Optimized Super Spectra lens coatings and lens element shaping suppress flare and ghosting - more prone to occur with digital cameras due to reflection off the image sensor. Coatings also help achieve true color balance and increase contrast for vivid hi-fidelity images.