The 50mm f/1.4 standard lens is a terrific choice for both casual and professional photographers. The lens is outfitted with two high-refraction lens elements and new Gaussian optics, which combine to eliminate astigmatism and suppress astigmatic difference. As a result, the lens obtains crisp images with little flare even at the maximum aperture. The lens's f/1.4 speed, meanwhile, is perfect for available-light shooting. And as a bonus, this lens is the only lens in the EF system to offer an extra-small Micro Ultra Sonic Motor (USM) while still providing a full-time manual focusing option. Other features include a close focusing distance of 1.5 feet, a 58mm filter size, and a one-year warranty.Specifications

• Focal length: 50mm
• Maximum aperture: f/1.4L
• Lens construction: 7 elements in 6 groups
• Angle of view: 46 degrees
• Focus adjustment: Overall linear extension system with USM
• Closest focusing distance: 1.5 feet
• Filter size: 58mm
• Dimensions: 2.9 inches in diameter and 2 inches long
• Weight: 10.2 ounces
• Warranty: 1 year

Camera Lens, Canon, Canon EF 50mm f/1.4 USM Standard Lens, 2515A003