Albinar 500mm-1000mm f/8 Super Telephoto Mirror Lens for Canon EOS Cameras Mark II, III, IV, 5D, Mark II, 7D, 10D, 20D, 30D, 40D, 50D, 60D, Digital Rebel xt, xti, xs, xsi, t1i, t2i, t3, t3i, 450D, 500D, 550D, 1000D, 1100D, 600D 500mm f/8 Mirror Lens + 2X Teleconverter T2 Mount for Canon EOS Includes 30.5mm filters - ND2, ND4 and Skylight Features multi-coated low-dispersion glass capable of producing sharp, high definition images