1. I hear ya, ok i will ask about that, although it seems strange that its sold as back focus matched, and when i enquired about it before ordering i was told it would put it to the correct distance.
2. i dont use the nosepiece anyway, its MPCC adaptor, then MPCC thats it!
3. Thats a good idea
4. Thats another good idea
Quote:
Originally Posted by multiweb
Hey Duncan, I have the exact same configuration as you. F/5, MPCC,QHY8. Here's what I do.
1_ I use a custom telescopic adapter that Peter Tan made for me. He's go the blue prints. 55mm was too short of a distance in my case.
2_ I got a NULL adapter (no glass) to replace the standard nosepiece. No more reflections from the MPCC glass onto the nosepiece glass.
3_ I flocked my scope. No stray light and reflections.
4_ I tried to collimate it real real real good. Well as good as I could but you get the idea.
All in one it made a huge difference. I'll still get halos if I push exp time on alnitak or M45 but that's a given with pretty much any scope. HTH.  |