Quote:
Originally Posted by Cola
Yes I have ED80 scope.. I was thinking of 900mm or 1200mm would be nice.. but I guess a barlow would help double that??? I am very happy with the ED80, as sick of trying to align my tracker at night.. so if the goto will help me with less time of setting up the polar alignment.. as I said.. without a computer... but something mobile or wireless that I can prog it to focus on one thing and track it!
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The ED80 is good for a wide FOV, because of its short focal length, but the problem with using a Barlow is that as it increases the focal leh it also increases the focal ratio, which determines how quickly your images show up on the sensor. At its native focal length, there's still a never ending source of targets
In an ideal world, we'd all use large aperture scopes with very "fast" (low numbered) focal ratios. In practice, these exist but are very expensive.
For more of a zoomed in view, you'd be better off with something like a 8" or 10" f/5 imaging newt. In which case, you'd want the AZ-EQ6 with the extra payload capability.