Buy from Amazon.com : http://fave.co/1NihNIr <br /><br />Pentax 21mm F/3.2 AL Limited Lens for Pentax Digital SLR Cameras<br /><br />Product Description : <br />Equivalent focal length to 315mm in the 35mm format with ist D series <br />The image circle is designed to match the CCD used in PENTAX digital SLRs xceptional high contrast high resolution optics with minimal aberrations <br />Thin lightweight design 49 ounces 55 ounces with lens hood <br />Comes with a lens hood to minimize flare and ghost image <br />Responsive Quick-Shift Focus System allows instant shift from AF to MF
