Buy from Amazon.com : http://fave.co/1Cs0jrW <br /><br />Opteka 500mm Telephoto f/8.0 Mirror lens for Pentax K Mount<br /><br />Product Description : <br />High definition optics produce sharper more intense pictures <br />Incredibly compact and lightweight Fully Multi-coated Manual Focus <br />Soft pouch and three 3 rear mounted 305mm filters ND-2X ND-4X Skylight <br />May be combined with the Opteka 2X Multiplier for 1000mm Zoom Sold separately - 47st Photo Item Code B000JSZ41S <br />10 Year Warranty
