I hear you! Thanks for the valuable input!
Yes, spending some more $ could get to the next level of performance by cutting out the prisms for a start using a binoscope and the mirror based folding of the optical paths.
That APM binoscope you reference is quite heavy and would almost certainly require a pier mount and would be best suited for an observatory (someone correct me if I’m wrong)!
Provided the scratched/gouged can be replaced, the binocular APM 150 should still give pleasing views of DSO, and is reasonably portable to dark sites. I realize there are inherent limitations with the prism design, but this is often seen with binoculars of all kinds ( flare, glints, decreased contrast, etc).
Certainly the extra Euro 4500 for the binoscope gets you more, but the hidden costs or considerations are a pier mount (to deal with the higher mags and increased weight), and a permanent darksite to place an observatory.
If you already live in a great site and have an observatory, you would likely be going for the binoscope.
If you want to go to darksite, and do outreach etc the binoculars could be preferable.
Food for thought! Again thanks for the valuable input!
Edited by Greenflash1, 12 August 2019 - 01:59 PM.