This weekend I had first light of my refurbished Newtonian Telescope. It is 60 years old and was used in observatories as a visual scope for a long time.
I took it home, cleaned everything, Flocked the Tube, made a mirrormask, new Focuser, new Tuberings etc. to make a astrograph out of it.
as a first test, I aimed it a several bright targets to see how it performs. I expected nothing but was pleasently suprised to see that it performs pretty good.
Now I realized in my tests that even though it seemed sharp there was still a slight blur to the photos especially the stars.
I have this video as reference on how sharp a newtonian can be : https://www.youtube.com/watch?v=f5bLMDQN2NA
I feel like my stars look a bit bloated and not quite in Focus even though my 6 spiked defraction spikes indicate that I was on point with my focus.
What could be the cause of this? maybe the backfocus? Coma corrector? or are the mirrors indeed to old and not quite up to the task?
Or am I just expecting to much out of my system?
I took it home, cleaned everything, Flocked the Tube, made a mirrormask, new Focuser, new Tuberings etc. to make a astrograph out of it.
as a first test, I aimed it a several bright targets to see how it performs. I expected nothing but was pleasently suprised to see that it performs pretty good.
Now I realized in my tests that even though it seemed sharp there was still a slight blur to the photos especially the stars.
I have this video as reference on how sharp a newtonian can be : https://www.youtube.com/watch?v=f5bLMDQN2NA
I feel like my stars look a bit bloated and not quite in Focus even though my 6 spiked defraction spikes indicate that I was on point with my focus.
What could be the cause of this? maybe the backfocus? Coma corrector? or are the mirrors indeed to old and not quite up to the task?
Or am I just expecting to much out of my system?
