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EP won't focus

Started by INeedMoreSpace, 06/14/2017 06:07AM
Posted 06/14/2017 06:07AM Opening Post
PLEASE HELP!!!
A few weeks ago I purchased a 14 mm Explore Scientific 100° EP. Unfortunately, the EP doesn't seem completely compatible with my Orion XT 10 dobsonian scope. I've tried adjusting the primary mirror (to both extremes) and even bought an extension tube. The reason why I bought the extension tube is because sometimes I could get the EP to focus if I pulled it slightly out of the fully racked-out focuser.
Any ideas for what I should try next or try again?
Posted 06/15/2017 06:10PM #1
All of our refractors, Newtonians and DOBs include an extension tube or two - depending on the scope. It really depends on the length of the draw tube.

I would assume he needs at least a couple of extra inches. If he can move the EP slightly above the focuser and reach focus, he needs more extension.

Greg Bragg
ES