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Yes, it will fit the 2" opening in your focuser. The SCT fitting is for use on the WO 66mm scopes, the 2" fitting comes screwed into the SCT adapter.
It will also drop your arcsecs/pixel down to 2.72 so you can use it in fairly ordinary conditions and still get full resolution with the 350D.
The second part of your question is yes.
Cheers
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