Super 500mm/1000mm f/8 Manual Telephoto Lens for Panasonic Lumix DMC GM5, GH4, GM1, GX85, GX8, GX7, GF6, G7, G6, GH3 G1, GH1, GF1, G10, G2 GH2 and GF2 Digital Cameras Super 500mm achromatic refractor telephoto lens 2x Teleconverter doubles the power of your lens to 1000mm. High index, low-dispersion multi-coated HD optical glass to reduce flare Built-in tripod collar for improved lens Balance Kit includes 500mm super telephoto preset lens, 2x doubler, t-mount, UV filter, lens hood, cleaning pen, dust blower, 47th Street Photo microfiber cleaning cloth