[Hemi]

..... I think I'm doing something wrong again!

Just got this and can't see a thing. I've searched on how I attach it, but all I get is either a massive central obstruction (40 celestron plossl) (sometimes off centre oddly enough) or nothing at all.....ie black!(12.5 Orion edge on).

I've mounted it before and after the diagonal....makes no change to the result down the EP.

What am I doing wrong folks?