[QUOTE=Merlin66;1412283]Whoooo!
That didn’t take long to arrive.
Not sure why you’d want to stop down the ST80 it should be OK with the Quark. Worst case you could add a UV-IR cut.
Thanks
Came in a week from OPT was very quick.
Quark works best from around F30 ideally f35 to 40 there was a big increase in detail when I stopped down
I could see multiple little proms in the 25mm eyepiece I tried
but yes bugger all else.