Product Description The EF-S 10-18mm f 4.5-5.6 IS STM lens combines optical excellence with cutting-edge performance, providing an ultra-wide angle of view in a compact, portable package, perfect for EOS cameras with an APS-C sensor. It has a 4 group optical zoom system and includes a large-diameter element, an aspherical lens element, a UD lens element and enhanced lens coatings for high-contrast, high-resolution images with minimal glare and aberration. A circular, 7-blade aperture helps ensure fine background blur and the Canon Optical Image Stabilizer system provides up to four equivalent stops of shake correction. The lens has a stepping motor STM and a refined focus mechanism for smooth and continuous AF during video recording. It also has a rear focusing system, plus a high speed CPU and improved AF algorithm for high-speed AF and offers full-time manual focus for quick adjustments. The EF-S 10-18mm f 4.5-5.6 IS STM delivers reliable, speedy and quiet wide-angle performance, making it an ideal lens for everyday photography, travel, stills and video recording. From the Manufacturer EF-S 10–18mm f/4.5–5.6 IS STM The EF-S 10–18mm f/4.5–5.6 IS STM lens combines optical excellence with cutting-edge performance, providing an ultra-wide angle of view in a compact, portable package, perfect for EOS cameras with an APS-C sensor. It has a 4 group optical zoom system and includes a large-diameter element, an aspherical lens element, a UD lens element and enhanced lens coatings for high-contrast, high-resolution images with minimal glare and aberration. A circular, 7-blade aperture helps ensure fine background blur and the Canon Optical Image Stabilizer system provides up to four equivalent stops of shake correction. The lens has a stepping motor (STM) and a refined focus mechanism for smooth and continuous AF during video recording. It also has a rear focusing system, plus a high speed CPU and improved AF algorithm for high-speed AF; and offers full-time manual focus for quick adjustments. The EF-S 10–18mm f/4.5–5.6 IS STM delivers reliable, speedy and quiet wide-angle performance, making it an ideal lens for everyday photography, travel, stills and video recording. Specifications Focal Length & Maximum Aperture: 10–18mm 1:4.5–5.6 Lens Construction: 14 elements in 11 groups Diagonal Angle of View: 107°30' – 74°20' Focus Adjustment: Rear focus system Closest Focusing Distance: 0.72 ft. / 0.22m Filter Size: 67mm diameter Max Diameter x Length, Weight: 2.9 x 2.8 inches, approx. 8.5 oz. / 74.6 x 72.0mm, approx. 240g MTF Charts