Used Tele Vue 3.5" Extension Tube Star Adventurer StarSense Explorer uses patented technology

StarSense Explorer uses patented technology and your smartphone to determine exactly where the telescope is pointed in the night sky

fully multi-coated 2-element objective and optional 2" Everbrite diagonal produce natural stellar and planetary color rendition even at the highest useful powers

Unlike other O-III filters

*We will continue to optimize the product based on test results

Used Tele Vue 3.5" Extension Tube Star Adventurer StarSense Explorer uses patented technologyCondition: This is a used Tele Vue extension tube. It is in excellent condition with little sign of wear on the body. There are no scratches. Model with two tension screws. Description: Telescope drawtube extensions help your telescope reach focus when not using a diagonal as is the case in many imaging applications. They are also useful (with or without diagonal) when you need more out travel for focusing on nearby terrestrial subjects. Our extention