Rigel Systems Aline Collimating Cap

5,95 €
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Collimation cap for Newtonian telescopes


Look Into Your Telescope Through an Aline and you see a bright white circle surrounding the image of your eye's pupil, making it easier to center the primary and secondary mirrors, which is especially important for aligning rich field and fast Newtonian and Dobsonian telescopes.


1000's of Alines are in use around the world (yes thousands) since Rigel Systems introduced the first retroreflector collimation eyepiece in 1995.


Simple in design, Aline uses an ultra-reflective microprism retroreflector and the light gathered by your telescope to produce a brighter image than "classical" cheshires or even so called "reflective" cheshires (which are retroreflector collimation eyepieces -- not cheshires) that use less reflective microsphere retroreflectors.



This collimation cap is a practical aid when collimating a Newtonian telescope. In the absence of a more intricate collimation tool like a Chesire eyepiece or a laser collimator this simple tool can be a great help in finding proper collimation for your newtonian telescope.


Just insert it in the 1.25" focuser and look through the small hole in the center. Now you can do the alignment without accidentally moving your eyes off the center of the focuser, which would result in bad alignment.


You only need to center the secondary, the primary, the reflection of the secondary on the primary and the reflection of the collimation cap on the secondary. As soon as everything is concentric the telescope is properly collimated.

If you own a laser collimator the collimation cap helps you center the secondary in front of the focuser - something that couldn't be done with the laser alone.


Comes with instruction sheet.