Alstar Alignment 1.25" Next Generation Laser Collimator 2" Adaptor for Newtonian Telescopes

Affordable price. Great seller.

I would give it a 5 star but NO WHERE in the instructions does it tell you what type of battery does it take. (CR2032) It does not include one either. I had to come back to the page and pose a question to get an answer. We happen to have such a battery on hand and its really dim when you first insert. Maybe it has to be in the dark to use it?

Used for collimating my 8 inch Dob Telescope. Followed instructions on U TUBE. Easy to use.

Good

I doubt this is just an isolated incident. After the battery has been installed and I turn the knob to on, the laser does NOT stay on and you have to touch and move the knob to make it stay on. It is probably not making good contact somewhere in the laser but it was NOT where the battery compartment was. I say, so you do NOT have to waste your time sending it back after getting a little frustrated, just spend a few bucks more for a reliable name brand laser. Peace to all

This was well made item that just does not work. Dial-up for intensity does not work. Bad contacts, I guess. It does not seat well, which can cause misalignment. I was disappointed.

Waste of money

This collimates my Celestron NexStar 130 SLT perfectly. The laser is really bold and powerful, so hilariously works great as a cat toy that won't break or fail after 10 minutes of use.The 7 choices of laser brightness is a nice touch but unnecessary.

Did not work properly it looked like the box was opened so I returned it.