Quote:
Originally Posted by bytor666
Somebody here said that the 2" GSO barlow was not that good. I have one of these and it is an excellent 2" Barlow lens. I wouldn't get rid of it ever. The diff between an apochromatic barlow and an achromatic one are so minimal...it makes no difference, and I have been observing for years. 
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Mark
12" Gso scope
15x70 Oberwerks
10x50 Magnicons
14mm UWA (4000) and 8.8mm UWA (4000's)
30mm 2" GSO eyepiece on the way |
I have a GSO 5x 1.25" apo barlow and it does work well too, of course if you combine an apo barlow with a achromatic eyepiece it will defeat the purpose if chromatic aberation is what you're trying to avoid.