making a binoscope

Hi,
This is probably a dumb question but here goes. I'd love a binoscope. I already own an ed 100. Inquiries as to what it would cost to buy another one and equipe as a binoscope came out to about $3000 not including the scope. I was wondering why can't one canabalize a high quality bino and use the prisms in the diagonals used for the scopes ? The prisms used in bino scopes look like binocular prisms anyway. For any extra in travel an oca used on binoviewers should be able to provide.
Thanx in advance

Itz,

The prisms will need to be fairly large to work well. Why cannibalize a large pair of quality binos to make a pair of binos?

More to the point, in good binos, the objectives will be made to correct for the spherical abberations created by the large blocks of glass that are the prisms. If this correction is not made then the final images will not be as good as they should be. If you want to use well corrected telescope objectives to make a bino, you need to use mirrors to shift the images to the eye point. Mirrors won't mess up the fine figure of the objectives.

hope this helps,
dan

Folks used to do this back in the old days.

You might want to try the idea out using a set of cheap 60-80mm achro scopes first.