Rigel Systems Aline 1.25" Telescope Alignment Eyepiece / Collimation Cap

Our Price: $7.50
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Rigel Systems Aline Telescope Alignment Eyepiece / Collimation Cap

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  • Rigel Systems Aline Telescope Alignment Eyepiece / Collimation Cap
  • Rigel Systems Aline Telescope Alignment Eyepiece / Collimation Cap

Product Details

A Must for Rich Field and Fast Newtonians & Dobsonians - Rigel System's Aline 1.25" Collimation / Alignment Cap

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.

Thousands of Alines are in use around the world (yes, thousands) since Rigel Systems introduced the first retro-reflector 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.

Please note that the center pupil is approx. 2mm in diameter and will be centered within +/- 0.5mm, which is considered adequate for its intended use in this price range. Other higher priced metal collimation caps are available for those requiring higher centering accuracy.