Explanation : Features: Compact, lightweight design with a 5x Zoom ratio -- 28 to 135mm equivalent Excellent optical quality: Aspheric element with two Aspherical surfaces utilized Close-focusing
to 1.15 feet -- at 135mm, fills the frame with subject 3 x 4.4 inches Ring-type Ultrasonic motor for superior AF performance; allows full-time MF Image Stabilization extends the lens''s usefulness
in low-light levels Circular Aperture design -- natural highlights, even stopped down two stops Non-rotating front element; lens length does not change during zooming EF-S lens mount -- exclusively
for EOS 20D and Digital Rebel bodies Filter Size: 67mm Maximum Diameter x Length, Weight: 3.1" x 3.6", 16.8 ounces