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I tried a variety of Barlows when setting up a fairly similar imaging system. The best I found is the 1.25inch TV 3x, which can be used up to about 5x with extenders (it's close to perfect optically). The other two Barlows that turned out to be good quality are a TV 2 inch 2x which is great for lunar imaging (low scattering) and a 2 inch GSO ED 2x which I use for collimation and to improve cheap eyepiece performance. Two other 1.25 inch Chinese Barlows that I bought along the way have been turned into moderately expensive extender tubes. Regards Ray
Last edited by Shiraz; 23-05-2011 at 03:24 PM.
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