Constructed with eight elements in six groups and with radioactive thorium oxide glass, the Canon 55 mm F/1.2 lens renders excellent quality images. With a 55 mm focal length and 0.6 m closest focusing distance, this Canon lens lets you capture the minutest details. This camera lens features f/16 aperture, which offers optimum light transmission for perfect illumination in the images. The 58 mm filter of this Canon lens protects the lens from moisture, dust, and scrapes. Featuring an eight bladed diaphragm, this camera lens optimally focuses on the subject, rendering an excellent background blur. For added protection, the Canon 55 mm F/1.2 also features a BS-58 lens hood.