[Poita (Peter)]

It is this:
http://www.optcorp.com/sx-sxv-ao-sxv...ve-optics.html
plus this:
http://www.optcorp.com/starlight-xpr...is-guider.html
and this:
http://www.optcorp.com/sx-oag-ext-l-...nsiontube.html

You can use it on any scope that you can use an OAG on really.

I also have a lodestar guide camera to suit.
http://www.optcorp.com/starlight-xpr...utoguider.html