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What you said is quite right Rex. 2 min or slightly longer subs are
achievable with care, and with 500-1000mm f/l scopes. The struggle
with 60 sec subs with an 8" SCT did of course mean with it being used
at it's native f/10.
I myself have no means of guiding, and may probably never have, so I
am just seeing how far I can get without it. I used to guide manually, but have had enough of that.
raymo
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