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

Worked well right out of the box. Collimation of the laser beam was perfect and I liked that it had multiple setting for the beam intensity. Well worth the price.

It came in a box and secure. The laser was very helpful to collimate the telescope. The laser itself was accurately aligned from the factory by testing it on my laser collimator testing setup. On target 4 foot away spinning it al around and ensuring the laser beam did not stay away of the bullseye.

I purchased this collimator, but was surprised that it did not include a battery. After reading the fine print on the Amazon website, I found that a battery was not included. After finding a CR 2032, I tried to install the battery, but found it was a hard fit. The retaining ring was very tight, and made it hard to screw down the battery screw plate. The paper work that came with the collimator did not indicate the battery type. Except for the battery problem, I found that the Laser Collimator work in collimating my 6 inch Celestron DOB. The adjustable laser brightness worked well with a setting of 3.

Well built, collimation of device was spot on. Works great.

I bought this collimator because the laser itself can be alligned. In the images on amazon you can see allen screws towards the end of the collimator. This is so you can allign the laser, (make sure that it points true) so you can accurately collumate the mirrors.Essentially this device will require occasional callibration and more frequently, verification of alignment before collimation.I was annoyed that they covered the allen screws with silicone with the one I got. I understand why, to act as a light thread locker. It only took a couple minutes to remove though.If your curious how to verify and allign the laser, I would suggest looking up some videos on youtube. Some advice though, a cheap engineers V-block to use for allignment would be the simplest method.Don't let that scare you, alligning the laser is essentially the same principle of collimation, except now you get to do it twice!When calibrated though, this does make collimation drastically more intuitive, meaning it is worth that little extra effort in maintaining the tool.

I didn't have to collimate it. It was already collimated.

Didn't come with a battery as advertised. There must be one company in China that makes these things and a dozen companies that slap their names on them. The laser is still weak which is disappointing. It was advertised as brighter and crisper... I dont see it. Even with a fresh Energizer battery. Well never hurts to have a spare when you have several scopes but temper your expectations.

Device appears to be sturdy and well-made. The CR2032 battery was easy to install, and the laser itself was easy to use. I installed it in the 1.25" eyepiece slot on my 6" Orion Dobsonian, following the guidance from Orion's YouTube video on how to do laser alignment with their telescopes. I had never collimated my telescope before. Despite being badly out of alignment, the process only took a few minutes to align the primary and secondary mirror. It's so easy I will definitely just check the mirror alignment every time now before using the telescope.If there is one nitpick, it is that I did not find the paper instructions included that helpful on their own. But combined with the Orion YouTube video, it was very straight forward.