Guidescope

OTA Specifications: Aperture: 40mm Focal Length: 220mm Focus Ratio: f/5.5 Objective Type: Triplet Dual ED Air-spaced APO (Objective lens) Sextuplet Refractor for full-frame astrophotography (with reducer) Overall length: 145mm (photographic mode with focal reducer) 160mm (observation mode without star diagonal) Helical focuser travel: 30mm Weight: 395g Back-end Adapter: M42x0.75 (photographic mode) 1.25" Adapter (visual observation mode) Thread Extensions: Reducer Connection Adapter - 28mm Extension 1 - 55mm Extension 2 - 75mm Back focus:  83mm from end of Field Reducer 55mm with Reducer Connection Adapter Accessories:  FMA180 Body Pair of tube rings Finder scope bracket Two extension tubes 1.25" Adapter Allen Wrench