This is considered the standard lens for use with Canon SLR cameras

Amazon.com Product Description Lightweight and affordable, the Canon EF 50mm lens--which offers a fast f/1.8 aperture--is an excellent lens for people who prefer a fixed focal length. Canon's lightest EF lens at a mere 4.6 ounces, the lens boasts a traditional Gauss-type optical design that delivers a sharp performance even when wide open. As a result, the lens provides an image that's extremely close to how your eye perceives a subject, making it excellent for portraits and images that require a natural depth of field. In addition, the lens focuses as close as 18 inches, helping you take extreme close-ups. Finally, the lens offers an excellent color balance. As with all Canon lenses, the lens carries a one-year warranty.

• Focal length: 50mm
• Maximum aperture: 1:1.8
• Lens construction: 6 elements in 5 groups
• Diagonal angle of view: 46 degrees
• Focus adjustment: Overall linear extension system with Micromotor
• Closest focusing distance: 1.5 feet
• Filter size: 52mm
• Dimensions: 2.7 inches in diameter, 1.6 inches long
• Weight: 4.6 ounces