Opteka 420-800mm (w/ 2x- 840-1600mm) f/8.3 HD Telephoto Zoom Lens for Sony a9, a7R, a7S, a7, a6600, a6500, a6400, a6300, a6100, a6000, a5100, a3500, a3000, NEX-7, 5, C3, 5T, 5N, 5R, F3 Digital Cameras

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QUICK SPECS: Push/Pull Zoom, Manual Focus, Minimum Focus Distance: 5.25' (1.6 m), Aperture -16, Filter Size 62mm, 4 Elements in 2 groups Multi-coated Glass Optics, Rotating Tripod Mount, 5-Year Warranty NEW AND IMPROVED: The Newly improved Opteka 420-800mm lens incorporates multi coated glass optics for the sharper images. Its 4 elements in 2 groups have been digitally-optimized to give the best image possible without braking the bank. A built in rotating tripod mount has also been added to help stabilize the lens especially when using the 2x converter which increases the zoom to an incredible 1600mm. ADVANCED OPTICS: Featuring an optimized design, this lens uses mirrors and a series of 4 optical glass elements in 2 groups to reduce chromatic and spherical aberrations. A anti-reflective coating suppresses lens flare and ghosting for increased contrast and color fidelity.