Lee,
My ED80 is fitted with an ED100 Crayford Focuser. Exactly the same size (both models use the same tube) but it has a very very long barrel. The ED100 focuser came with a longer barrel than the ED80.
You can wind focus out for about a week
Works great when Barlowing, no need for an extension tube
Here you can see it wound out. Look how long that sucker is!
