I love my 6" f/5 Newton, it has a lot of really good qualities.
BUT it comes with a 1.25" focuser and I cannot find a Coma Corrector in that dimension. A 2" coma corrector can be had everywhere but I do not want to change my focuser just to buy a coma corrector.
Has anybody got a 1.25" coma corrector to sell or know where to get one from?
I'm confused, there are two different Omni XLT 150s, a 150mm Newtonian
reflector which changed from a 1.25" focuser to a 2" in 2013, and a
150mm refractor which has a 2" focuser, but I think this scope was discontinued a while ago. What exactly do you have? If you have a pre 2013 Newt you can fit it with a 2" focuser.
raymo
I'm confused, there are two different Omni XLT 150s, a 150mm Newtonian
reflector which changed from a 1.25" focuser to a 2" in 2013, and a
150mm refractor which has a 2" focuser, but I think this scope was discontinued a while ago. What exactly do you have? If you have a pre 2013 Newt you can fit it with a 2" focuser.
raymo
Hi Raymo,
My scope is from 2008 and came with a 1.25“ focuser. I haven’t used this scope in a long while but would like to take some photos with it. My hope was that there is a commercial market for 1.25” coma correctors just hidden from my view. But if changing the focuser is the only way, then I might have to consider that and do some research.
Thanks anyways!
Before going any further I would suggest that you ensure that your Newt
can be used for imaging. Many Newts are made for visual, and a camera cannot get close enough to the scope to come to focus. If this is the case
the primary mirror would need moving further up inside the tube.
raymo
Thanks Bill. Really helpful article. I guess I’ll have to start thinking about another focuser and what type of coma corrector I want. But I’m in no rush and think these are questions for another post at the time that budget and time allow a bigger investment. Thanks for all your helpful posts. Too bad though that there doesn’t seem to be an easy fix i.e. a commercially available 1.25” CC for a good price.
While I was browsing Cloudy Nights this morning, it appears that Televue made a 1.25" Paracorr in the past. So you may be able to find a second hand one in the various Astromarts around the world.
While I was browsing Cloudy Nights this morning, it appears that Televue made a 1.25" Paracorr in the past. So you may be able to find a second hand one in the various Astromarts around the world.