The Pentax SMC FA 645 55-110mm f/5.6 is a zoom lens designed for Pentax 645 mount medium format cameras, both film and digital. It is designed for general shooting and has a standard to medium telephoto field of view with a 35mm equivalent focal length of 43.5-87mm. Also, it has a constant minimum aperture of f/5.6 and can stop down to f/45.
