The Shorty 2x barlow I have from Orion is mediocre. Not that I use it - not much use for DSO's
Undoubtedly made by GSO
I have never had much success with GSO unfortunately. The FR they make for Orion I have my suspicions on too - seems to give my ED100 "pinched" optics look to photos that are NOT present without it. (I ordered a genuine SW FR made specifically for the ED100 instead now). Plus, EACH of the drawtube extensions from GSO I have SEEM fine, until you release the weight being supported as you tighten the thumb screws - then it sags, and you get misalignment. NOT impressed thus far, hence never ordering one of the RC scopes yet. Cheap is as cheap does I guess, but I am being subjective and your result will undoubtedly vary.