Celestron Collimation Eyepiece (1.25") - Allows the Realignment of Newtonian Telescope Mirrors

Comments about Celestron Collimation Eyepiece (1.25"):

I needed a new collimating eyepiece for use with a new Ritchey-Cretien telescope and picked this one up based upon advice from other owners of the same type of telescope.

The eyepiece is really easy to use and makes aligning the optics a breeze. It is solidly built and is not a cheap knockoff.

That said, it is larger and heavier than I had imagined.

Comments about Celestron Collimation Eyepiece (1.25"):

Used this to tweak the collimate of an Orion XT6 classic Dobsonian scope. Easy to use. All elements that need o be collimated are clearly visible. Simple and effective device.

Instructions were clear and easy to follow.

Got a great star test as a result.

Comments about Celestron Collimation Eyepiece (1.25"):

This collimation eyepiece is inexpensive, simple to use and definitely worth the money. As a beginner astronomer, the rather daunting task of collimating my new telescope was made easy and it was done within a couple of minutes.

If you're purchasing a Newtonian for the first time, I would recommend ordering this at the same time.

Comments about Celestron Collimation Eyepiece (1.25"):

This collimation eyepiece is a must have! It is very simple to use and does a better job than more expensive laser collimators. A laser can help line up your secondary with a primary, but unless you buy the super expensive barlowed laser, the final collimation just can't match the precision of this Cheshire sight tube combination.

I have found it takes me only a couple of minutes to fine tune my fast Newtonian before each observing session. The sight of the cross hairs perfectly overlaying the primary's center dot, with the cheshire's donut of light around it gives me complete confidence that my alignment is correct.

I might even pop it in for a quick confirmation if I am pointing the scope more at the horizon, for say, saggitarius, because the mirror may tilt due to gravity. It is an instant check that can prevent misalignment prior to a long exposure photograph. It is impossible to argue against and can save your entire imaging session.

For the money, best accessory that will make an actual difference to the quality of your observations. It never needs batteries and it's a solid chunk of aluminum. Even your 5-year old can't break it. A must have for any fast reflector.