Hi again. Well I did some homework (actually hubby, Bob found the info in the book, yes the one I swore it wasn't in) and the focal length is 1200mm and the focal ratio is f/4.7. With this knowledge and the article you directed me to I should be able to work out what filters I need to get with what eyepieces.
I better start on my letter to Santa.
Thanks for your help.
Michelle
PS. Oh, the make of my scope is Orion.