Mount a guide scope on an optical tube assembly (OTA) or two telescopes side-by-side with this Baader Double Mounting Plate with 3" Dovetail from Alpine Astronomical. Measuring 11.8", the mounting plate is compatible with 3" Losmandy-style dovetail clamps. The plate accepts Baader guide scope ring sizes #1 and #2 and offers numerous mounting options for bars and clamps, including Baader 190mm and 230mm Pan EQ clamps, V-clamps, and Stronghold Tangent Assembly. It is pre-drilled to fit 10Micron and Astro Physics mounts.