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Ahh, thanks Alex. I realise now that I blundered the calculation of eyepiece focal length, your version:
max focal length = f/ratio of scope X 6
is nice and straight forward.
By the way, for those that don't already know, the value of 6 (or 7) is for the Exit Pupil.
As for the super wide apparent fields, I suppose I wont know until I try. There doesn't seem to be an astronomy club in Dubbo so I haven't been able to sample anyones gear (If any one on the forum is from around here, please say G'day)
I'm going to Sydney tomorrow to pick up a scope, so at last theory will yield to practical... when this rain clears up anyway!
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