Andy,
it is 1175mm focal length, f/4.7 native. With Paracorr in my case it was working at 1352mm (effective f/5.4 ).
Personally, I don't think EQ6 would be quite enough. (I haven't tried it though)
On the other hand I've seen people put 12" Newtonians on EQ6 and actually do take decent deep sky shots, so I guess it really depends on how finicky one is.
Bratislav
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