AstroSystems LightPipe/SightTube Combination
The LightPipe functions just like a Cheshire collimator, but with two important differences. First, the acrylic lightpipe will not darken or corrode with time, like the aluminum reflector used on a Cheshire. Second, the lightpipe is non-directional to illuminate. When using a flashlight at night to illuminate the tool, any angle works, unlike the temperamental Cheshire. The 2-in-1 collimator accurately aligns optics in Newtonian telescopes (LightPipe) as well as accurately aligning the focuser with the secondary mirror (SightTube). Save time and money. Precision-made anodized aluminum, acrylic insert and stainless steel crosshair wires. Includes 14 page instruction booklet.