OK, well thats interesting. Someone else explained this to me painfully before too (he takes 1 hr subs). I understand the other factors that can make longer subs difficult, but youve renewed my interest. I might actually try and take say 2hr subs when I can and see if it makes a difference (in my stupid need-to-try-to-believe mind). I know that in dark skies, read noise is always the dominating factor.
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