[Dealy (Kev)]

Originally Posted by Amaranthus

That's not quite true: http://www.dens-astropics.org.uk/page%2035.htm

But I agree that in most cases, 30 min subs are overkill and 10-15 min is fine even for faint DSOs (and shorter for bright cores etc.)

Thanks for the link to the article Barry - great info