I'm very grateful for all of these responses and the link to the binewt site. Very interesting and has me imagining! I wonder how to site the focuser tubes on a binewt so that they can be practically used. The photos on Dave's binewt site seem to indicate that the eps are under the scope. This would be fine for higher objects, but with a shorter focal length scope say 1500 mm it would make viewing lower objects quite difficult. Are there other arrangements? Has anyone used one of these and if so, how was the accessibility of the eps?
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