500mm f/6.3 Manual Focus Telephoto Mirror Lens + 2x Teleconverter = 1000mm For Sony Alpha a7, a7S, a7IIK, a7II, a7R, II, a6100, a7000, a6000, a5100, a5000, a3000, Mirrorless Digital Camera For Sony (E-Mount) Sony Alpha a7, a7S, a7IIK, a7II, a7R, ILCE7RM2/B a7R II, a6100, a7000, a6000, a5100, a5000, a3000, NEX NEX-7, NEX-6 6/B, 6L/B, B2BDL, NEX-5, 5N, 5T, 5TL, 5TL/S, 5TL/W, 5R/B, 5RK/B, NEX-3, F3K/B, F3K/S, 3K, 3NL/B, 3NL/W Compact Interchangeable Lens Mirrorless Digital Camera The 500mm f/6.3 Manual Focus Lens is a catadioptric mirror T-mount lens, precision manufactured in South Korea. 7 Elements in 6 Groups. -- Aperture is fixed at f/6.3. -- Focuses to 6.1' (1.86 m) White lens barrel helps prevent heat retention. The 2x Teleconverter is a high-quality that delivers enhanced telephoto versatility. It multiplies the focal length by 2x, providing an affordable and portable way to extend your cameras reach.