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Rigel Systems Aline 1.25" Telescope Alignment Eyepiece / Collimation Cap

4.9 (30 Reviews) Read Reviews Write Review
Brand Rigel Systems
Part Number -
Availability available

Product Info

Manufacturer Description

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.

Reviews

4.9 (Based on 30 Reviews) 97% of reviewers recommended this product.
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    1. Guest

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      Review by Kerry R.
      1551720307
      Mar 4, 2019

      5.0 Works particularly well

      Pros:

      Cons:

      Comments:

      After spending some time comparing this tool to others in my tool box, I've really come to appreciate the fact that this tool "self centers" because of the way it press-fits into the focuser. This makes the tool's placement extremely repeatable.

      The reflective surface is very bright, even at night with a red flashlight.

      I like the simplicity of this tool, and the simple, clean "dot" the hole presents in the reflection of the typical notebook reinforcement ring primary mirror center marker.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Guest

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      Review by Robert A.
      1550242374
      Feb 15, 2019

      5.0 Aline collimation cap

      Pros:

      Cons:

      Comments:

      These caps are almost impossible to find, but they are a quick, easy, inexpensive device for collimating Newtonian reflectors. Works well. Very satisfied with Agena's service and prices.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      Review by Dave W.
      1548532167
      Jan 26, 2019

      5.0 Great Product

      Pros:

      Cons:

      Comments:

      Hi-quality, good fit, works as advertised

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    4. Guest

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      Review by Jerry K.
      1547641750
      Jan 16, 2019

      5.0 Simple is sometimes best

      Pros:

      Cons:

      Comments:

      Works well on my 10 inch Dobson. Paired with a Cheshire with sighting tube works well for collimating a reflector.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    5. Guest

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      Review by Barry C.
      1544843380
      Dec 14, 2018

      5.0 Works

      Pros:

      Cons:

      Comments:

      Works

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    6. michaeldowns

      michaeldowns New Member

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      Review by michael d.
      1535968932
      Sep 3, 2018

      5.0 one of the most useful,

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      Comments:

      one of the most useful, simplistic, and effective ways to teach people new to Newtonians how to collimate. I have bought several over the years just for that reason. The last two both went to newbies a bit intimated by the process and both immediately grasped the principle.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    7. Guest

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      Review by Felipe W.
      1535188369
      Aug 25, 2018

      5.0 Very good

      Pros:

      Cons:

      Comments:

      Very good

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    8. Guest

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      Review by Thomas M.
      1531025415
      Jul 7, 2018

      5.0 Who needs a laser

      Pros:

      Cons:

      Comments:

      Simplicity at its best. Well made, snug fit and dead simple.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    9. Guest

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      Review by Douglas N.
      1522655551
      Apr 2, 2018

      5.0 Collimating Cap

      Pros:

      Cons:

      Comments:

      Inexpensive, simple to use.. Does the job.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    10. Guest

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      Review by Michael S.
      1522107062
      Mar 26, 2018

      5.0 Works perfectly

      Pros:

      Cons:

      Comments:

      Great for alignments and polar alignments. Can also use with an off axis guider. Good little piece.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    11. Guest

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      Review by Joe D.
      1512443764
      Dec 4, 2017

      5.0 Simple, Inexpensive, Effective

      Pros:

      Cons:

      Comments:

      This is an accessory everyone should have to easily collimate a scope. It's easy and quick to learn how to use it and your scope can be operating at top performance in no time. In fact, it's a good idea to use right before every observation session, just to make sure everything is properly aligned. I'll always keep one in my eyepiece case!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    12. Guest

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      Review by Robert K.
      1503527971
      Aug 23, 2017

      5.0 Um, It Did What It Was Supposed To Do

      Pros:

      Cons:

      Comments:

      So it's supposed to be a cap with a small hole in the middle. It is. Victory is mine!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    13. Guest

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      Review by Emilio M.
      1500274821
      Jul 17, 2017

      5.0 Worked great

      Pros:

      Cons:

      Comments:

      Worked great

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    14. Guest

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      Review by Michael B.
      1500078677
      Jul 14, 2017

      5.0 Rigel Systems Aline 1.25" Telescope Alignment Eyepiece / Collimat

      Pros:

      Cons:

      Comments:

      This Collimation Cap is everything you can expect - nothing fancy, but well made and a perfect fit. The reflective insert makes it very easy to see without a whole lot of light. I'm using it on my 6" StarHopper Newtonian to replace the one lost by the prior owner.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    15. michaeldowns

      michaeldowns New Member

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      Review by michael d.
      1495790700
      May 26, 2017

      5.0 collimation cap

      Pros:

      Cons:

      Comments:

      A most simple yet accurate way to collimate a newt.The inside of the cap is lined with a 'white' background making it easy to see and align in daylight to dusk conditions.Every 'newt' owner should have one in his/her toolbox.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    16. Guest

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      Review by William M.
      1494123976
      May 6, 2017

      5.0 A practical collimation device for Newtonian telescopes.

      Pros:

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      Comments:

      Don't be fooled by the simplicity of this collimation device. It is well made and accurate. Ideal for centering your diagonal mirror under your focuser and if your primary mirror is accurately center spotted does an excellent job of aligning both elements of the optical path. Tested on my GSO 10" Dob with excellent results and checked along side a well known brand of Cheshire/sight tube collimation device. Very useful and highly recommended. Agena , great outfit to deal with for your Astronomy needs. William

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    17. Guest

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      Review by Dale L.
      1493575122
      Apr 30, 2017

      5.0 Collimation cap

      Pros:

      Cons:

      Comments:

      This was highly recommended to me and it fulfills all my expectations.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    18. Guest

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      Review by Tammy T.
      1488730436
      Mar 5, 2017

      5.0 Very happy with items & seller

      Pros:

      Cons:

      Comments:

      We needed the pin hole covers and these are perfect; came quickly, fair price.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    19. Guest

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      Review by William B.
      1488048835
      Feb 25, 2017

      5.0 Worked for me

      Pros:

      Cons:

      Comments:

      Though the instructions could have been easier, this beginner collimated a Celestron Powerseeker 127 for the first time fairly easily.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    20. Guest

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      Review by Matt E.
      1484844953
      Jan 19, 2017

      5.0 It works!

      Pros:

      Cons:

      Comments:

      Does what it says it should and it fits nicely. Works as advertised. All I need to collimate my orion xt8i.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    21. Guest

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      Review by Robert A.
      1482589449
      Dec 24, 2016

      5.0 Aline

      Pros:

      Cons:

      Comments:

      Works great make it easy to use

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    22. Guest

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      Review by David B.
      1482589217
      Dec 24, 2016

      5.0 Rigel Collimation Cap

      Pros:

      Cons:

      Comments:

      A great tool to collimate my reflector telescope. Helps make the process easier and faster.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    23. Guest

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      Review by Mike of Phoenix, AZ.
      1475193600
      Sep 29, 2016

      5.0 Great Cap

      Pros:

      Accurate,Easy to Use

      Cons:

      Comments:

      Exactly what I needed to collimate the scope!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    24. Guest

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      Review by jntkwx of Burlington, VT.
      1454630400
      Feb 4, 2016

      4.0 Just what I was looking for

      Pros:

      Lightweight,Compact,Easy to Use

      Cons:

      Comments:

      I have a hybrid Jones-Bird Newtonian telescope (with a small barlow lens mounted inside the focuser tube). In short, this makes it quite difficult to accurately collimate. After doing some research online, I came across this nifty, cheap, but well-made collimation cap. It is simple and easy to use, and allows much more accurate collimation than what I was able to get previously.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    25. Guest

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      Review by TomH of Crossville, TN.
      1454630400
      Feb 4, 2016

      4.0 Low Cost Newt alignment option

      Pros:

      Compact,Accurate,Lightweight,Easy to Use

      Cons:

      Comments:

      Easy, low cost Newtonian alignment option.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    26. Guest

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      Review by technomaget of Robbinsville, NJ.
      1424476800
      Feb 20, 2015

      5.0 Very good for a very low price

      Pros:

      Easy to Use,Compact

      Cons:

      Comments:

      Good for secondary mirror collimation and centering, but not as accurate as a Cheshire. Price is great.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    27. Guest

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      Review by evhap of Kensington CA.
      1422662400
      Jan 30, 2015

      5.0 Simple, inexpensive alignment tool.

      Pros:

      Easy to Use,Compact,Lightweight

      Cons:

      Comments:

      Although these alignment tools usually come with Newtonian telescopes, if you've lost yours, this is an excellent and inexpensive replacement.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    28. Mark1Eyeball

      Mark1Eyeball New Member

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      Review by Jim G. of Suburban MD.
      1390694400
      Jan 25, 2014

      5.0 Inexpensive and effective

      Pros:

      Easy to Use

      Cons:

      Comments:

      I have mine do double duty as a dust cap on my dobsonian. It is in position, then, for a quick check of the scope's collimation after taking it afield and setting up.

      Get your primary tilt close with the Rigel Aline, then do a star test for the final tweak.

      Bottom Line: Would you recommend this item? No
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    29. Guest

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      Review by Ron from NY of Ossining, New York.
      1375488000
      Aug 2, 2013

      5.0 Great collimation tool

      Pros:

      Accurate,Strong Construction,Lightweight,Compact,Easy to Use

      Cons:

      Comments:

      I use this in conjunction with my Cheshire/Sight tube for spot on collimation.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    30. locoman

      locoman New Member

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      Review by Locoman of Abilene, KS.
      1335744000
      Apr 29, 2012

      5.0 Good Product

      Pros:

      Accurate

      Cons:

      Comments:

      This collimation cap works well and the price is right!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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