Here is a link to info on these binoviewers
http://www.stellarvue.com/bv.html
Mine are the black unit with eyepieces and case shown at the top of the page, and also include the binoviewer adapter(barlow) and extension tube. My unit is in as-new condition, the only visible marks being very faint scratches on the nose piece from insertion into a diagonal. The self-centering eyepiece holders are very nice.
It reaches focus in a sct without the adapter. Either the adapter or a separate barlow lens is needed in most refractors. The binos reach focus in my Bintel/GSO 10" dob with the extension tube and adapter in place; I'd estimate the magnification in the dob is about 120X with the supplied 23mm eyepieces.
Price: $245 including insured shipping
