This is a high-performance 400mm super telephoto lens featuring an extremely light and compact design ideal for photographers requiring high mobility and portability. The optical system incorporates one element made of Super UD glass and on element made of standard UD glass, thus effectively correcting color aberration and delivering extremely sharp, high-contrast imaging performance. Other features that ensure convenient operation include a built-in hood, a removable ring-type tripod mount, and a focus range selector that allows the user to select the full 3.5m / 11.5ft.-to-infinity distance range or restrict the range to 8.5m / 27.9ft.-to-infinity.