Posts Made By: Faron Dillon

Hi Kevin, I had a Megrez 110 that I used exclusively for AP. The collimation was perfect in my sample. However, like with many of the WO scopes, bright stars exhibited spikes which was quite obvious in photos only. There were some post out there suggesting this artifact was a result of the spacers protruding into the light path which didn't entirely make sense to me. I removed the lens cell, and loosened the retainer ring on the rear lens. On the side of the lens cell there is a ring of felt. Underneath the felt, there are three (or 4??) plastic screws which I loosened as well. The screws are covered with glue so make sure you clean the slots before trying to turn them. I tapped the lens cell lightly with the scope facing down to center the rear element. I tightened the retainer ring just enough to hold lens in place. I star tested and the collimation was certainly out. I adjusted the side screws until the collimation was perfect again. Don't apply too much pressure on these screws since they are plastic and can easily be stripped. The pressure on the lens was culprit for the spikes on the stars. Subsequent photos were spike free and the collimation was perfect again. The scope was now a much better performer than it was before. I would strongly recommend you send the scope to WO to have this work done if it's under warranty or if you don't fully understand the mechanics of the collimation procedure.
I found the instructions posted somewhere a few years back but I don't remember by whom or where. It certainly wasn't by trial and error. Good luck with it.
Faron