Opteka 420-800mm f/8.3 HD Telephoto Zoom Lens for Pentax K-70, K-50, K-3 II, KP, K-1, K-S2, K-S1, K-500, K-30, K5 IIs, K-7, K-5, K-2, K20D, K100D, K110D and K10D Digital SLR Cameras

QUICK SPECS - Push/Pull Zoom, Manual Focus, Minimum Focus Distance: 5.25' (1.6 m), Aperture f/8.3-16, Filter Size 62mm, 4 Elements in 2 groups Multi-coated Glass Optics, Rotating Tripod Mount Newest version achromatic 420-800mm f/8 lens in T-mount, compatible with APS-C and Full Frame cameras alike. With the optional Opteka 2x converter you can double the focal length to 840-1600mm OPTICS - High index, low dispersion multi coated High Definition Glass Optics in four groups and four elements to reduce flare and ghosting.

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