Very helpful, thanks.
For imaging through the PST + 2x barlow:
DMK we get - 1.45 arc-sec per pixel
Gstar gives - 2.20 arc-sec per pixel
For me the DMK has been proven by the images posted at IIS and others. I saw some taken with the Gstar and a Mintron, but they were not so good (solar only).
It certainly seems reasonale and I can understand that solar system objects would have differing parameter optimums from deep space.
I have time to research and hopefully wait for Astrofest, still deciding on laptop.
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