420-1600mm focal length covers a wide range of possibilities from telephoto to super telephoto - ideal for sports, wildlife, nature, travel, portraits and more Fast maximum aperture of f/8.3 throughout the zoom range - provides excellent low light performance and greater control over depth of field HD (High Definition) coating improves image contrast and color reproduction while minimizing ghosting and lens flare Rounded 9-blade diaphragm creates a more natural out-of-focus appearance known as bokeh This is our new product, a professional HD Manual Telephoto Lens with high definition for Pentax K-1, K-S2, K-S1, K-500, K-70, K-50, K-30, K5 IIs, K-7, K-5, K-3 II, K-2, K-X, K20D, K100D, K110D DSLR Cameras. It is made of high-quality optical glass and metal lenses, making the pictures more clear and realistic. The manual focus design makes it more convenient to use, and the HD large-aperture lens makes the photos more clear and bright. It also has a detachable camera lens hood and a snap-on lens cap, making it more convenient to use.