Pentax 400mm F5.6 Ed If SMC Fa 645 Mount Lens

For use with the Pentax 645 camera. The smc FA 645 400mm f/5.6 ED IF Lens from Pentax is a medium format, manual and autofocusing telephoto lens with a 35mm-equivalent focal length of 315mm. Extra-low dispersion (ED) glass is used to eliminate chromatic aberration for improved sharpness and contrast. Multi-coatings offer protection and prevent reflections on the inside of the lens to minimize ghosting and flare. Also helping to prevent flare is the supplied large lens hood. Quick AF/MF switching is also possible, and an internal focusing system enables easy MF operation and improves focusing speed while minimizing lens extension, allowing for a closer minimum focus distance. Additionally, the lens features a rotating tripod collar with clip to enable speedy switching between vertical and horizontal orientations. Medium format, manual and autofocusing telephoto lens with a 35mm-equivalent focal length of 315mm Extra-low dispersion (ED) glass is used to eliminate chromatic aberration for improved sharpness and contrast Multi-coatings offer protection and prevent reflections on the inner side of the lens to minimize ghosting and flare. Also helping to prevent flare is the supplied large lens hood Fast AF/MF switching is also possible, and an internal focusing system enables easy MF operation and improves focusing speed while minimizing lens extension, allowing for a closer minimum focus distance Rotating tripod collar with clip to enable quick switching between vertical and horizontal orientations Aperture can be stopped down from the maximum of f/5.6 to a minimum of f/45 via the aperture ring in manual mode. Alternatively, full automatic diaphragm control is available.