I'd like to note that when hooking up an STL series to many of the Takahashi scopes, you shouldn't use special SBIG 2" nose peice. You use a special adapter such as these -
http://www.optcorp.com/product.aspx?pid=7121&kw=Feldstein& st=2
This ensure you obtain a full image circle, unvignetted field of view. Though, again, not sure what happens with a field flattener.
