More on Amazon.com : http://www.amazon.com/gp/product/B004IB2T6K?tag=thefatkidin06-20 <br /> <br />Celestron 80mm Guidescope Package with 125mm Rings and 80mm Guidescope with Extension Tube <br /> <br />Complete package includes 125mm rings and 80mm Refractor Guidescope <br />600 mm 2362 in Focal Length with 75 Focal Ratio <br />Compatible with Celestron NexGuide Autoguider <br />Includes Extension Tube to help reach focus without having to use a diagonal <br />M42 thread on extension tube allows you to slide NexGuide autoguider barrel into extension tube or thread guider directly onto extension tube
