The dumb question of the day No. 322

[earth titan]

Didn't know where to post this, so i'll try here but if it needs moving mods, then please do so.

How crucial is the distance between the coma corrector and the camera back on my f4 imaging newt?

New to the use of coma correctors etc. and it only just dawned, I might need spacers or similar. Been persevering for a long time now to correct the problems it has, as I still get weird shaped stars (distorted rings (not spheres)).

If so, how do I sort the spacing?

[AndyUK]

Hi Tom - I have a Mak Newt so have (thankfully!) never needed to get involved in Coma correctors, but the spacing will be critical... especially on an f4 newt. Unfortunately I can't personally help (sorry), but I'm sure someone will be along soon that can...

[Stephen]

I think this got covered in the other thread?

http://stargazerslounge.com/showthread.php?t=188286