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2 x 4" Refractors or 1 x 6" ??
Gentlemen, your opinions please! I've got a pair of 4" F5 acromats in a box setup as a pair of binoculars - which actually work pretty well. This year might be time for an update. For deep sky stuff, do you think I would be better off swapping them for a pair of 4" F9 ED's OR buying a 6" F8 acromat and putting the bino viewer on it?
I've already got one ED F9 refractor which I'm pretty impressed with. I've shortened the tube by about 5 inches so the bino view works in it. Both alternatives would cost about a grand (unless I can source one s/h). The six inch would be big beast - I'd have to make up a alt/az mount for it whereas the four inches will slip straight into the box I've already got. So, a pair of 4's or a split 6. For deep sky stuff, what do you think?
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