 "Canon EF 20mm f2.8 USM"@en " Canon USM | Digital SLR Camera Toronto Canada Store Cameras Aden "@en
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                        Ultra-wide-angle lens for serious applications. Easy to hold and carry at 14.3 oz. (405g). Floating rear focusing system. Sharp images are obtained at all subject distances.
SPECIFICATIONS
Focal Length & Maximum Aperture: 20mm 1:2.8  Lens Construction: 11 elements in 9 groups  Diagonal Angle of View: 94?  Focus Adjustment: Rear focusing system with USM  Closest Focusing Distance: 0.25m / 0.8 ft.  Filter Size: 72mm  Max. Diameter x Length, Weight: 3.1" x 2.8", 14.3 oz. / 77.5 x 70.6mm, 405g
What's in the box:

EF 20mm f2.8 USM Lens
Front and Rear Lens Cap
Instruction Manual

1 Year Canon (International) Canada and USA Warranty
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 "Canon EF 17-40mm f/4 L USM Lens"@en "Camera Lenses :: Canon Lens - Onestop Digital"@en
"A new and affordable L-series ultra-wide-angle zoom lens that's ideal for both film and digital SLRs. Superior optics are assured by the use of three aspherical lens elements  in addition to a Super UD (Ultra-low Dispersion) glass element. Optical coatings are optimized for use with digital cameras. This lens focuses as close as 11 inches (0.28m)  and offers both Canon's full-time manual focus and a powerful ring-type USM for fast and silent AF. It has a constant f4 maximum aperture  and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters. Finally  it offers weather-resistant construction similar to other high-end L-series lenses.  "@en 