Hi, I have an Omegon 2'' SC Hybrid Crayford focuser, dual speed attached to my Celestron Edge HD 8 scope. Up to now I've only used this for AP but wanted to set it up as an observational rig. I'd also like to use the focuser. My question is can I attach a 90 degree dielectric diagonal after the focuser and then the eyepiece for strictly observational use. Will the addition of the extra path length mess up my focus? Will it be impossible to find a focus? I obviously don't own a 90 Degree diagonal in oder to do the experiment but I don't want to buy one unless it's possible to find a focus.
Thanks for any help,