Canon EF 50mm f/1.4 USM Lens was introduced back in June 1993. It is an old lens but many photographers still like it included me. It is sharp, light, and fast. It contains two high-refraction lens elements and one Gaussian optics. It becomes 80mm equivalent with attach to 1.6x crop SLR camera with APS-C sensor like Canon EOS 400D Digital or his brother Canon EOS 40D Digital. It is a wonderful portrait lens.
