Re: [Utah-astronomy] Image scale basics (WAS: Ring Nebula (M57) - Be prepared to squint)

Good point, plus, it's an interesting activity in itself. On Sun, Aug 11, 2013 at 10:05 AM, Erik Hansen <erikhansen@thebluezone.net>wrote:

To me the biggest advantage to building your own tube assembly is that you can match the prime focus point to the eyepieces or other equipment you plan on using.