[Starkler (Geoff)]

Originally Posted by casstony

There is some technical testing of one of these mirrors with images at this translated german site; go to 'Tests of Optics', page 9, 'GSO with divisible tube'.
http://translate.google.com/translat...%3Den%26sa%3DG

I have seen one or two examples of very good gso mirrors, but I wouldn't think the one tested there is a typical sample. Those numbers are typical of the larger "premium" makers, such as OMI or Galaxy.

Funnily enough, my best ever view of Jupiter was through a newt with obvious undercorrection, but I was lucky enough to viewing during one of those rare moments when the atmosphere "froze solid". How sweet they are.