Spider vane problem

[libraryman]

Hi, can someone tell me whats causing the double spider vains left of stars?

the image is a 20min sub, taken just before the moon came up tonight 200mm f/4.4 reflector

the image is a 3"x4" crop resized

focus seems fine but i can see coma as well but not bothered about that since i'm not useing a coma corrector

Ray

[paul mc c]

There is a thread in Scopes/Set Ups at the minute and it lookes the same thing that you are seeing,it may help.

[paul mc c]

Sorry the thread was started by Malc C.

[libraryman]

Thanks for the heads up Paul, some good ideas in there, i'll keep an eye out to see how Malc c goes on.

R