I bought a 2nd hand 8" bintel dob and new to telescopes so I am not sure whether the focuser is broken or this is how they work...
When the scope is upright the focuser knobs move the EP part in and out like a camera focuser, but when viewing on say a 45 degree angle it just falls in and I have to manually pull it out to where I want it, then lock them in with the 2 screws.
I've tried tightening 1 screw and turning the focuser but its locked.
Here are some pictures of my scope inside and outside.
pic #1 - inside the scope
pic #2 -1. is the focuser knobs 2. is the locking knobs
pic #3 same as #2 without flash
Any help is much appreciated.
