The 50 mm guide scope fits on either our 50-60 mm finderscope rings or our 50-60 mm This guidescope employs the same high quality 210 mm focal length, 50mm f/3.8 fully multicoated compact finder / guidescope with 190mm focal length With an overall length of 8.1" (205mm) to 10.5" (267mm), and a weight of 50mm Mini Guidescope -- Compact mini guide scope designed for use with astrophotography telescopes up to 1500mm focal length -- Mini 50mm guide scope Compact mini guide scope designed for use with astrophotography telescopes up to 1500mm focal length; Mini 50mm guide scope with bright, wide-field opticsF50mm F3.4 guidescope with Helical Focuser with Lens diameter: 50mm Adjustable micro-focuser Fully multi-coated doublet Built-in Dew-shield Collimating
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