[b]The Astro Essentials 30mm f/4 Mini Guide Scope is a compact, lightweight solution to guiding.[/b] Works with most short-medium focal length imaging systems.Has an extra long focus range so is compatible with pretty-much all guide cameras. Its wide field and fast f/4 focal-ratio ensures you will have no difficulty finding a suitable star to guide by. Supplied with three mounting shoes, including one for Sky-Watcher / Synta. Weighs only 285 grams so won't adversely affect balance!  [b]Features[/b] [list] [*]Wide FOV. [*]Fast f/4 focal-ratio. [*]Anti-reflection coated optics.  [*]1.25" push fit & T2 connections. [*]Smooth helical focuser with lock-ring. [*]Compression ring eyepiece clamp. [*]1/4" photo thread on shoe will fit regular tripods. [*]Metal screw on cap. [*]Weighs only 287g. [/list]