Description GENERAL Available May 2003 Dimensions 83.5 x 96.8 mm (Diameter x Length) Weight 500 g Colors Black Key features USM quiet autofocus Super ultra-low dispersion glass Super spectra anti-flare coating Auto / Manual focus Dust & moisture resistant OPTICS Optics type Wide Angle Zoom Lens Image size Full Frame Focal length 17-40mm 28-70mm Equivalent APS-C Maximum aperture F4 Minimum aperture F22 Closest focus distance 28 cm Max magnification 0.24x OTHER COMPONENTS Filter diameter 77 mm Mount type Canon EF AF actuator Ultra Sonic Motor Lens elements 12 Lens groups 9 Diaphragm blades 7 Component features USM Quiet Autofocus Super Spectra Anti-Flare Coating Super Ultra-Low Dispersion Glass Dust & Moisture Resistant
