Measures 2.7 inches in diameter and 1.7 inches long , weighs 6.5 ounces.This lens takes a 58mm filter.</br>Focal length: 28mm, Closest focusing distance: 1 foot</br>Broadens angle of view and increases depth of field to bring more area into focus</br>28mm wide-angle lens with f/1.8 maximum aperture for Canon SLR cameras</br>High-precision aspherical lens minimizes distortion and other aberrations</br>28mm wide-angle lens with f/1.8 maximum aperture for Canon SLR cameras</br>Broadens angle of view and increases depth of field to bring more area into focus</br>High-precision aspherical lens minimizes distortion and other aberrations</br>Measures 2.7 inches in diameter and 1.7 inches long; weighs 6.5 ounces.This lens takes a 58mm filter.</br></br>Product Description</br></br>EF 28MM F/1.8 USM</br><br/>http://www.amazon.com/gp/product/B00009R6WU