This is a decent quality dew shield, flared slightly at the end, so it will never block any portion of the incoming light. The plastic threads are very easy to cross, though--mine are already stripped after only a few dozen uses. It is still easy to thread it one snugly enough to stay in place for a full viewing session.
The inside surface could also be a bit less reflective and the price could certainly be a lot lower. If I had it to do again, I'd probably buy a flexible shield for our ETX.
Pros: Never loses its shape
Cons: Hard to thread on correctly, pricey
This review was written in the old system and had content requirements that are different than reviews written today.