Buy from Amazon.com : http://fave.co/1BPmeHI <br /><br />Tamron AF 28-300mm f/3.5-6.3 XR Di LD Aspherical (IF) Macro Ultra Zoom Lens for Pentax Digital<br /><br />Product Description : <br />Worlds smallest and lightest 28-300mm lens June 2004 <br />28-300mm focal length <br />f35-63 maximum aperture <br />XR Extra Refractive Index glass <br />Multipurpose lens for Pentax 35mm film and digital SLRs macro to telephoto ranges
