Explore Scientific 8x50 Finder Guide Scope, Illuminated Guide Scope
Selecting a Guide Scope and Autoguiding Camera for Astrophotography
60mm Guide Scope Finderscope for Astronomical Telescope 240mm Focal Length F4 Focal Ratio Guidescope with Helical Focuser - Walmart.com
Guide Scopes for Astrophotography | A Complete Guide
Autoguide flexures
Amazon.com : Astronomical Telescope Scope Guide Finder with Double Helical Focuser,60mm Guide Scope,Comes with a Bracket,Aluminium Alloy Material,Lightweight and Durable : Electronics