Hi starkler get your self a Powermate to use with the orthos.
Best investment in planetary viewing or CCD .
I use a 4X powermate with my 25 18 and 12.5mm University orthos and there is no light scatter or change to the eyerelief .
It is my standard planetary combo and works well for me.
With a 4X PM I can use a web cam with out having to resort to eyepiece projection . I have a barlow but find the powermate far supperior to it for high power stuff.
Mark
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