The filter works great on my Meade ETX 125. Perfect for lunar observing to reduce overall brightness and glare. Since it's adjustable it's much more user friendly than having to remove the eyepiece to add/remove different threaded filters.
Pros: Very easy to use, no distortion
Cons: A little pricey for what it is
This review was written in the old system and had content requirements that are different than reviews written today.