Celestron 94182 Cheshire 1.25 inch Collimation Eyepiece, Black

It seems this device has been around for a while and rightfully so. I have a Celestron Astromaster 114eq and an 8" Sky-Watcher Dobsonian and this works great for both of them. Easy to use and I was able to focus both scopes to perfect detail. I was considering a laser type collimator (I like electronic gadgets) but read that those may need periodic collimating also - that seems kind of strange to me. I'm not sure how you would do that. Anyway, this unit is simple to use and effective.

Maybe this is not recommended to collimate a RC telescope, but it worked for me and with the simple design there is nothing needed to check the accuracy of this eyepiece.

This works well for collimating your telescope, which was rather intimidating. I had read there can be problems with laser collimators, so I bought this. After reading and watching numerous instructional tutorials, I tackled my scope and successfully collimated it.

I purchased this to help with the collimation of a few telescopes I have, thought it would improve the process. Was hoping to be able to take this out of the package and with a few directions it would be a simple task. Unfortunately the directions were a little hard to follow for the first timer that I felt like I was. After finding some internet help, I was able to Collimate my scopes and the tool does make it a simple process. I shared this with some of my friends who have experience in this. They found the eyepiece to be very helpful. If you know what you are doing it is out of the box great, if you are a novice like myself it takes a little playing. While I ultimately managed to complete the process, it was a little frustrating at first. If you are planning on transporting your scope regularly, I would recommend this tool. When finally completed, it did a great job.

THANKS GREAT ITEM

Very well made. I bought this to have one more way to collimate our telescope. I tested collimation with the ring around a star and with the cheshire and had the same results.

It’s built well, I’ll give it that. I’ve never successfully used it, however. I’m guessing it’s operator error, but the instructions are not good. One day I’ll take the telescope and this contraption to someone smarter than me and I’ll figure out how to do it.

Using this collimator to align the mirrors in a reflector scope is a must-have item. After the procedure, images are crisp and clear across the field of view, even with my relatively small (3" F9) Celstron reflector. Frankly the instructions for me especially as a first time user are not easily understood, especially in discerning between various images seen through the eyepiece. I researched "collimation" on the web, and pieced together sufficient info to understand all the images fairly well. Also placed a small, stick-on center dot on the main mirror for convenience during alignment. Definitely recommend this eyepiece - quality built for the money - it will be used periodically to keep the scope in tune, and it can be used as one graduates to larger reflector scopes. I never tried a laser collimator, but with the excellent results from this piece, not sure that a laser is necessary, at least with an F9 scope - perhaps it might make a difference on an F5 or lower, just guessing.

Quality is good. The wires that form the X on mine were about a 1mm off center, but you can try bending, although im hesitant to do so, afraid of breaking them off. But most importantly, it does what supposed is supposed to do, which is to center the secondary in the focuser, collimate the tilt of secondary and primary. If this is your first collimation device, then this is what you need. Dont buy a laser first, youll mess up more than fix your accuracy.

Perfetto per collimare tutte le parti del telescopio riflettore: focheggiatore, specchio secondario, specchio primario. Naturalmente occorre saperlo utilizzare a dovere, ma una volta presa confidenza con esso, è veramente preciso. La collimazione dello specchio primario, la più frequente, è un attimo.

Muchas Gracias, llego en excelentes condiciones y en el tiempo estimado. Le quedo perfecto al telescopio Celestron 76EQ, al principio fue complicado collimar ya que es el collimation es el básico(sin láser) pero con unos cuantos tutoriales ya le vas entendiendo, pero si buscas comodidad, es mejor el laser

Made from quality materials does exactly as a state recalibrates the eye peace

Après avoir réalisé la colimation sur tube newton le résultat est parfait. Environ 30 minutes pour un réglage optimal. Beaucoup plus efficace qu'un colimateur lazer.