My favourite NV scope is I think my C11 which has given me some fantastic views with a 0.75x reducer and 55mm plossl (effective system speed f3.3).
However, I had a dose of aperture fever last year and ordered a 16 inch goto dob manufactured by sky vision in France.
It turned up late last year and I as it was my first dob I was a bit shocked by the size and bulk of it.
I had a couple of goes with it but struggled with the coma corrector spacing (I had the Es one) and was a bit disappointed with the nv views it gave since the edge stars were pretty horrible.
The scope got mothballed for a few months.
Then events happened which enabled me to take it to my dark sky site for further testing. I also purchased a Televue paracorr which increase the f ratio of the scope a little but enable me to be more confit about getting the coma corrector working properly.
I set the scope up carefully last night following the paracorr instructions and with an ethos in non nv mode the views looked good across the field of view. However once I moved to the nv monoculars and 41mm panoptic the star shapes at the edge weren’t great. I was disappointed. I checked the paracorr instructions and I’d done everything right. I think checked the collimation again and it was a bit out. After adjusting and redoing collimation twice I eventually got decent stars with the panoptic.
Are nv monoculars more sensitive to non-accurate collimation than normal glass eyepieces??
Anyway after a few hitches with the goto setup I eventually got everything working well. By this time it was getting very late so I only managed a few objects in Cygnus. But they looked rather nice - a step up in resolution to my c11 phone images I think and the visual views are also noticeably better.
Here is the Pac-man, eastern veil and crescent nebula (25 secs, 20 secs and 20 secs exposure time)
I’m now looking forward to using this scope again despite it taking materially longer for me to setup compared to the c11.