Collimation Advice.

Posted on July 14, 2011 by

I have a 12′ Dob and need some advice on collimation without the laser pointer. Apparently the one I have (which is a laser pointer) not that great.

Ciel Clair

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About rgrover

I am a third year student at SFU, Major Econ Minot Math. I always had a passion of Astronomy and Thanks to Howard Trottier, I can finally pursue this passion Project.
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3 Responses to Collimation Advice.

  1. sdavid says:
    July 20, 2011 at 12:54 pm

    The one I use when I dont have my laser collimator is by using the techniques here:

    http://www.skyandtelescope.com/howto/diy/3306876.html

    Basically, you aim at a star and defocus is so that the star becomes a circle (which happens because of the central obstruction). If it isnt a circle, your telescope is not collimated and you use the knobs to collimate it till the image is circular.

  2. sdavid says:
    July 20, 2011 at 12:55 pm

    See the part about “star testing your collimation”

    Sorry forgot to mention that. :)

  3. sdavid says:
    July 20, 2011 at 1:02 pm

    Or if you want a handy dandy video.. here you go

    http://www.andysshotglass.com/Collimating.html

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