Canon EF-S17-55mm F2.8 IS USM Lens

Canon EF-S 17-55mm f/2.8 IS USM Lens Lens • Lens Type: Large-Aperture Standard Zoom Lens • Lens Mount: Canon EF-S Mount • Compatible Format: APS-C • Focal Length: 17–55mm • 35mm-Equivalent Focal Length: Approx. 27–88mm • Maximum Aperture: Constant f/2.8 throughout the zoom range • Minimum Aperture: f/22 • Lens Construction: 19 Elements in 12 Groups • Diaphragm Blades: 7-Blade Circular Aperture • Image Stabilizer: Yes • Marketed: May 2006 Optical Design • Lens Construction: 19 Elements in 12 Groups • Aspherical Elements: 3 o 1 Glass-Molded Aspherical Element o 2 Replica Aspherical Elements • UD (Ultra-Low Dispersion) Element: 1 • Diaphragm: 7-Blade Circular Aperture Image Stabilization • Optical Image Stabilizer: Yes • IS Effectiveness: Approx. 3 Stops Autofocus & Focusing • AF Drive: USM (Ultrasonic Motor) • Autofocus: Supported • Full-Time Manual Focus: Supported • Minimum Focusing Distance: 0.35m / 1.15 ft. • Maximum Magnification: 0.17× Angle of View • Diagonal Angle of View: 78°30′–27°50′ Zoom • Zoom System: 5-Group Helical Zoom • Front Group Movement: 27mm Filter • Filter Diameter: 77mm Dimensions & Weight • Maximum Diameter: 83.5mm • Length: 110.6mm • Dimensions: Approx. Ø83.5 × 110.6mm • Weight: Approx. 645g / 22.8 oz. (lens only) Compatible Accessory • Lens Hood: EW-83J