Collimation specialty eyepiece 94182 - Celestron Telescopes Collimation Specialty Eyepiece 1-1/4" 94182

was easy to use when i figured out that i had to remove the relay lens built into the focuser.then iwas able to re aline the optics with no problem. i am an itermediat observer
Pros: easy to use, quailty constructiony
Cons: instructions could be better

This review was written in the old system and had content requirements that are different than reviews written today.