Canon EF 50mm f/1.4 USM Lens with Case + 3 Filters + Accessory Kit Type: Fixed Length Lens Focal Length: 50 mm Camera Mount: Canon EF Aperture: Maximum: f/1.4 Minimum: f/16 Compatibility: Canon EOS Diameter: 58 mm Focus Type: Auto Focus Lens Construction: 7 elements in 6 groups