B079CCV8X3 Opteka 500mm f/6.3 (with 2X- 1000mm) Telephoto Mirror Lens for Fuji X-Mount X-Pro2, X-Pro1, X-T2, X-T1, X-T20, X-T10, X-E3, X-E2S, E-E2, X-E1, X-A3, X-A2, X-A1, X-A10 and X-M1 Digital Cameras

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ADVANCED OPTICS: Featuring an optimized design, this lens uses mirrors and a series of 7 optical glass elements in 6 groups to reduce chromatic and spherical aberrations. A anti-reflective coating suppresses lens flare and ghosting for increased contrast and color fidelity.
SUPER ZOOM: Manual focus 500mm or 1000mm with the 2x converter, this lens is not only a superb long range choice, but also performs well in a variety of scenes from sports and surveillance to everyday shooting.
SOLID CONSTRUCTION: Full metal body and rear mount allow this lens to withstand wear and tear much better than plastic lenses while commanding a rugged, solid feel when using.
COMPACT AND LIGHTWEIGHT: Mirrors allows this lens to be much shorter than it would need to be without the mirrors. At 4.7-inches long, this 500mm f/6.3 is one of the shortest telephoto lenses currently available.
COMPATIBILITY: Can be used on all Fuji APS-C and full frame cameras including X-Pro2, X-Pro1, X-T2, X-T1, X-T20, X-T10, X-E3, X-E2S, E-E2, X-E1, X-A3, X-A2, X-A1, X-A10 and X-M1.