Quote:
Originally Posted by rogerg
Really, even with a diagonal? My 80mm and 90mm meters scopes have the focusser out about 15mm when using a standard 26mm ep and WO 2" diagonals. But, I have no experience with anything shorter than my 80mm
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I have two (an 80mm and a 90mm) and both need a good 180mm of extension tube before I can reach focus. Depends on the F/ratio I guess. Mine are F/6 and F/7 I think.