2" AR Series Focuser 500-1000 Simply remove the rubber stopper

Simply remove the rubber stopper and insert shaft through and attach with nut and washer

As an added bonus

Crafted from durable plastic and secured with no-corrosion brass rivets

put in a medium-powered eyepiece and do the same thing

Your long night has been marred by coma

2" AR Series Focuser 500-1000 Simply remove the rubber stopperExplore Scientifics dual speed, 2" AR Series Focuser comes with a 1. 25" compression ring eyepiece adapter for added versatility. This adapter or your 2" eyepiece or barreled accessory locks securely into place with three set screws so everything stays put. The heavy duty focuser has 10: 1 micro focusing knobs as well as a rough focus knob. This 10: 1 ratio means that you would have to rotate the micro focusing knob ten times to get the same focus