Good point , but I have heard that the GSO ones need a few adaptors/spacers to reach focus using a DSLR , not $850 worth tho
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Focusers should be comparible but for imaging a Moonlight would be the go but people do good stuff with the standard GSO and SW focusers after a little tinkering .
Every GSO Newtonion I have ever looked thru has has very good to excellent optics and build .
Your HEQ5 should carry the CF tube easily .
Brian.