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Hi Mark,
I use the Denk, and OCS (2"), in a 10" f5 newt, as well as all my other scopes (some with and some without the OCS).
My gut feeling is leave the scope as is, and use an OCS, even if you buy one to try and eventually go the way you have described. Making such radical changes to the scope simply for bino viewing seems a little excessive to me.
I have the focus point on the newt quite a way out, and use about 50mm of extension to view with an eyepiece. This allows me to slip a camera or whatever into the optical path and come to focus. It still is not enough for the bino viewer sans OCS.
I haven't noticed any real change in magnification without the OCS (I sometimes use it like this on the Tak Mewlon straight through), and can see no reason why it should. With the OCS there is a slight (evidently) change.
For lunar and solar viewing there is no comparison to using the bino viewer, but for deepsky etc, I still prefer cyclops.
Gary
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