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Mike it was an 80ED that had a shortened tube to take an AstroPhysics 2.7 inch focuser with an AP focal reducer that I bought just for the AP focuser andFR. I have now put these on the 100ED that I cut the tube off to get the correct length.
I replaced the focuser on the 80ED with a ScopeStuff Crayford focuser. It needs a 2" tube extender to get focus without a FR. But it is handy for focal reducer experiments as a FR needs IN focus.
My aim was to design an 80mm F5 APO astrograph with a flat field for C size sensors that anyone could afford. It does work. I have lent the modded 80ED to Andrew. I am putting together a FR as we speak as the experimental one was not suitable for prolonged use (too flimsy). I will send it to Andrew to see how it performs.
Bert
Last edited by avandonk; 21-03-2007 at 02:09 PM.
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