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Hi Gaston
Thanks for the detailed explanation, helped answer a number of questions.
but can you explain the effect altitude has on the size of the patch.
You mention that a low altitude, effects of seeing are averaged leading to a larger patch but its smaller at high altitude? Is this correct?
Finally are there any applications of thr onag on a newtonian with AO? The 66mm backfocus requirement does use up a lot of backfocus in most coma correctors including the rcc1.
As for the sharplock maxim plugin, how does it connect to the guide camera when maxim is also connected? And how is it dependent on the onag? Can it not be used with any oag provided the field is flat.
Thanks
AlistaIr
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