You know you are there when you start thinking in terms of EXIT PUPIL rather than Magnification..
Quote:I have a 6" reflecting Newtonian telescope my father and I built from scratch when I was a kid. I am looking now to make some updates to it now. I have seen some crayford type focusers listed here, 1.25" and with curved base. How much does the tube/mirror size (6" vs 13") affect the fit of the focuser to the tube? In other words, can a focuser used on a larger scope, still fit and work on a 6" one? Just want to make sure there isn't something I am missing and don't want to waste my money with something not compatible.Thanks Carol
George You know you're getting on when the equipment you farmed with is showing up as suburban lawn ornaments.