[gasman1 (Gary A Sitton)]

Well, I just got and tested my new 2" 2X GSO Barlow and it's very good. I found it to have a sharp, flat, color true, high contrast image over the entire field of view. The machining, finish and construction was impeccable. It compares very well with my 1.25" Celestron X-Cel LX 2X Barlow and gives me a 1.5X option also. It also seemed a bit brighter, but that's just an subjective opinion. The GSO has a 2-element ED lens whereas the Celestron has a 3-element lens with both with multi-coated lens. I'll probably be using the 2" Barlow exclusively as it's much more stable in my 2" focuser. I'm planning some moon shots in a few weeks using my new Orion 2" moon filter.