There is a model of Seibert binoviewer with specific OCS made especially to work with the PST - there is a fair bit of amplification though .
My plan is to get hold of another PST a make a true binocular with it- which will be the only way to use it at a relatively low magnification for a satisfyingly bright image. Howie Glator makes a bino platform for mounting two PST's on.
To use an Ha scope at unity magnification takes a larger blocking filter and lots of back focus. The best view I've ever seen of the Sun in Ha was with a Lunt Ha scope with large blocking filter and a Baader maxbright binoviewer. This was a $5000 rig but the view left you weak at the knees !
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