2″ Astrosystems Lightpipe / Sight tube (no laser/batteries required) for Primary and Secondary Mirror alignment

Original price was: $219.95.Current price is: $199.95.

Available on back-order


This is the best collimator we have tested.  The way it works, is that you fit it into the 1.25″ eyepiece slot, and slide it in.  When you look through it, you will be able to easily identify if you need to adjust the secondary holder up, down, left, right, forward or backward to get perfect alignment.  You then can adjust the primary, and readjust the secondary until perfect alignment is achieved.

This is superior to a laser as you can carefully check the secondary alignment, not just whether the laser beam ends up in the right place.

The white plastic top, you hold a small pocket torch up to, and it will illuminate the center dot on the primary, showing you clearly what you need to adjust.  So simple!

This unique and innovative collimator combines the LightPipe with the SightTube into one easier to use, lower-cost tool. 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 secondary mirror under the focuser (SightTube).

The 2″ version is easier to use in telescopes having a long focal length of (70″+) and proportionately larger secondary mirrors.  Save time and money with this 2 in 1 tool. Precision-made anodized aluminum, acrylic insert and stainless steel crosshair wires. Includes 14 page instruction booklet.

Additional information

Weight 1 kg
Dimensions 18 × 18 × 10 cm


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