Hey Guys, Subatomic here,
I am about to buy a GSO 8" Dobsonian and it has a
'Micro 10:1' Crayford focuser.
I was just wondering what the meaning behind that 10:1 ratio is and why it is described as 'Micro' 
( I'm guessing that it means you can make fine, 'micro' focus adjustments???).
If anyone could fill me in it would be great. Thanks! 