The SMC Pentax DA 55-300mm F/4-5.8 ED lens is ideal for anyone who prefers carrying around fewer lenses that handle more tasks. With a focal length range of 55-300mm, you can cover a wide variety of photographs, including landscape, portrait, macro, and nature photography. The lens also features a decent aperture range for a lens with a focal length range of 55-300, with the maximum aperture ranging from 4-5.8 depending on the focal length being used. The images that are produced using this lens are very sharp and only the limited maximum aperture prevents it from producing even greater bokeh effects. This Pentax lens does not include a built-in AF motor and relies on the camera's auto focus mechanism.