Home > Consumer Reviews > Celestron Collimation Eyepiece 1.25"

Celestron's tool is easy to carry, easy to use, and (at least in my case!) gives me quick, precision collimation with my Newtonian. Why pay for a laser collimator (which needs to be calibrated) when you can use this?

Collimation is the most important part of your setup; without good mirror alignment, all you'll see are blobs and blurs even on the best viewing nights. This combination tool makes aligning both primary and secondary mirrors fairly painless, and also fairly fast. Highly recommended for any level of observer.

This will collimate most Newtonians with minimal effort. No laser beam is necessary. Follow the instructions.

This thing works. Right out of the box I was able to line up my mirrors in less that an hour to textbook perfect diffraction rings on a star. It is the first real collimation my scope has had since I got it.

I bought a cheap Dobsonian over twenty years ago. Didn't use it much, had a couple of cheap eyepieces. It made pretty good images compared to other scopes but I was never sure of the collimation.

Fast forward to today when the internet allows people to communicate with each other! Read the reviews on collimators and the articles on collimation. This device is a consistent favorite. Cheap and effective, it goes right to the front of my new and improved eyepiece collection.

It works fine. Takes a little getting used to it, but works like a charm.

This is a great item for the "regular guy" in astronomy. Sure there are more expensive options (laser) but if you're collimating your dobsonian with a friend there is no easier/cheaper way than this tool. I've lined up my 8 inch dob with this tool multiple times and it never fails. Love this piece. Makes up an essential part of my dobsonian toolkit.