This is a modified microscope bino-viewer. Did I say it's a Zeiss
The prism(s) are gorgeous... I had a workshop modified the 45deg interface to strait and I removed the internal prism for the 45 deg angle. Unnecessary for astro.
It comes with 3 set-pair of eyepieces.
Nikon H.K.W. 10x
Bausch&Lomb 20 xWF
Olympus Tokyo WF15X
I tested the view with my C14 and it's impressive.
However I focus on astro-photo so no visual for me at the moment.
It suit to one who's mechanically minded.. the adjustment between the sides a bit loose. Can do a bit of 'tweaking'.
Still, I managed to 'merge' the 3d effect with the C14 with the FL of 3910mm! Collimation is reasonable despite the need for tightening the pivot mechanism.
Happy to sell and post in AU for $120. With the six eyepieces!
Cheers,
Mick