Quote:
Originally Posted by bytor666
What was the obvious difference?...When using my 2" GSO barlow, I don't see *ANY* light scatter. As for contrast, do you see MORE detail on say planets?....I think you are nit picking here, unless you got a DUD GSO barlow lens.
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Mark firstly it wasnt my barlow. I did a quick comparison between a Celestron ultima barlow and the 2 inch GSO barlow using a pentax 14mm xl viewing Saturn. The gso barlow showed a LOT more scattered light giving a much brighter halo of light around the planet. The effect is like driving at night with a dirty windscreen as opposed to a clean one. This is the difference between quality anti-reflection coatings and mediocre ones.
Have you compared the gso to a better (more expensive) one using a quality eyepiece?