Buy from Amazon.com : http://fave.co/1GnEadx <br /><br />PENTAX DA 10-17mm f/3.5-4.5 ED (IF) Fish-Eye Lens for Pentax Digital SLR<br /><br />Product Description : <br />Metal Pentaxr Kaf Lens Mount <br />Water- Oil-repellent Super-protective Lens Coating For Easy Cleaning <br />Extra-low Dispersion Glass For Superior Sharpness Color Correction <br />Responsive Quick-shift Focus System Allows Instant Shift From Auto Focus To Manual Focus <br />Image Circle Is Designed To Match The Ccd Used In Pentaxr Digital SLRs <br />10-17mm fisheye lens with f35-45 maximum aperture for Pentax digital SLR cameras