When I have used my Daystar Quark Hydrogen filter in the past, I have attached it to my Sky Watcher Equinox Pro 80mm OTA. However, I am now using that scope for my astrophotography setup and it is useful not to take the camera on and off the scope between sessions (for exampme keeping the camera attached to the acope wothout changing orientation between sessions allows flat frames to be used again and again a long as camera cooled to same temperature each time used and also makes for much faster setup times each time I want to do astrophotography).
Therefore, I have changed to using my Sky Watcher ED Pro 80mm OTA for solar and casual observing and keep it in my portable telescope kit.
Today was my first opportunity to check that the Quark came to focus on this scope…..It does – but only just! And that is with 1.25 inch diagonal not with 2 inch diagonal.
Photos below show the scope and Quark in action today and the focus position.