Most helpful positive review
19 of 19 people found the following review helpful
on 10 May 2013
OK, I'm seriously impressed with this. It's so easy to use, my telescope was properly and accurately collimated within about 10 minutes!
It's very well made. It feels solid, and not at all flimsy.
As other reviewers have recommended, I first checked the collimation of the collimator, in my case by placing it on a windowsill against the window frame, turning it on and gently turning it. No problems, it was delivered properly collimated, and the little red dot stayed stationery as I rotated it.
I next put it into the eyepiece holder on my telescope. As another reviewer said, it's very helpful if the centre spot of your primary mirror is marked, and I was pleased to see a very small circle at the centre point of my (Skywatcher) telescope's primary. The red dot from the collimator was way off, at least a centimetre, so I then adjusted the angle of the secondary mirror to centre the dot onto the primary.
I then moved to adjust the primary. As you can see from the pictures, the collimator has a cut away in the side, with a 'target' fitted in. You can turn the collimator in the eyepiece holder so you can see this target when you're up at the back end of the telescope. The red dot reflected back from the primary was a little off centre in my case, so I had to adjust the primary mirror to centre the reflection on the collimator target.
And that's it. My telescope is collimated, and I can check it whenever I need - certainly whenever I transport my telescope!
A very worthwhile purchase. I'd strongly recommend it to anyone with a reflector telescope.