WOGT-81 APO Focus Problem

[baileys2611]

Does anyone know why I would not be getting focus in my 80mm william optics refractor if I put the eyepiece directly in the end of the scope instead of using a 90 degree upright, or a 45 degree prism?

I have tried a few times with different eyepieces to get the scope to focus and can't get near it. Is this because the scope is meant for photography instead of visual observing?

[Larryp]

Because it is designed to have a diagonal, you need to use an extension tube to make up for the extra length normally provided by the diagonal to be able to use it for straight through viewing

[baileys2611]

AHA! Tadaa! Thank you Laurie. :thanx:

One more newbie, slightly less so thanks to shared knowledge.