Hi,
The 2" GSO Barlow has an adaptor so you can also use it with the 1.25" EP's.
I reckon you'll get view you want with your 15mm ep barlowed, and on a very good night, which is pretty rare, try the 9mm ep.
While the GSO plossls aren't top quality pieces of glass, they certainly aren't as dodgy as some may make them out to be.
"Serviceable" is a good word to describe them.
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