I had a few minutes last night so decided to compare my two ultra grab and go setups, looking at Cygnus and Sagittarius which are both now in decent positions (but with little sky darkness of course given time of year!)
One of the things I really like about my gen 3 thin filmed tubes is that they give very sharp stars and therefore, with the gain adjusted down a bit, show exceptional natural views, just like a normal setup, but of course able to see much more. The North America, Gamma Cygni, Swan and Eagle were all very nice even at just 3x and in a 17ish sqm sky.
Despite the vignetting caused by the positioning of the filter, I much preferred the views with the 3x afocal setup, pin sharp stars and very nice nebulosity. In comparison, the 75mm fujinon (which gives very close to 3x as well) showed bloated stars and even with no vignetting I just didn't like the views - they weren't natural.
The 3x afocal setup generally gets little love on here, but for me its definitely my preferred ultra grab and go setup. Last night's experience has really confirmed this.
Photo below shows the fujinon setup on the top with the afocal 3x below.
Edited by Gavster, 08 June 2021 - 02:23 AM.