" http://www.amazon.com/gp/product/B00009R6WU?tag=httpblogtrave-20
28mm wide-angle lens with f18 maximum aperture for Canon SLR cameras
Broadens angle of view and increases depth of field to bring more area into focus
High-precision aspherical lens minimizes distortion and other aberrations
1-foot close focusing distance light enough to function as standard wide angle lens
Measures 27 inches in diameter and 17 inches long weighs 65 ounces
Canon EF 28mm f/1.8 USM Wide Angle Lens for Canon SLR Cameras"