This smc Pentax-da 300mmF4ED If Sdm single focus lens is designed for Pentax's top-of-the-line lens series, combining exceptional imaging power and image rendition with outstanding operability and environment-resistant performance.The super telephoto lens of the Da series is designed for use on Pentax cameras with an Aps-c sensor, and here offers a focal length equivalent to the 35mm format of 460mm. And thanks to the Ff lens aberration correction this lens could be also used on cameras with 35 mm full-frame sensor.Note: The function does not guarantee the quality of the image outside the Aps-c image areaPrepared for long distance shootingThis lens with a high super tele lens performance, giving best opportunities for the use for sport events or in the field. On Safari in a game park, in the local Zoo or in the forest nearby, you could capture wildlife with a reasonable distance between you and your motives.