The 18 50mm f4 56 hd da dc wr re standard zoom lens from pentax features a newly developed retractable mechanism for outstanding portability lightweight compact and perfect for everyday use this lens is for use with pentax k mount digital slrs and comes with original hd coating super low dispersion glass elements and aspherical elements to effectively compensate various aberrations for sharp high contrast well balanced images its built in dc motor assures smooth quiet autofocus operatio