Quote:
Originally Posted by stringscope
Been posted before but here is my 8" F5 fo F16 refractor on alt/az mount. Hoop-pine ply with Oregon legs.
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Ian - both of yours are wonderful
I musy have missed mention of it before - but your refractor has adjustable ratios - f/5 to f/16? I notice the helical objective mount - so how do you change the f/length in relation to its diameter? Are you moving a flint & crown in relation to each other or something?