Hi again.
I will post some images later showing this evenings images with halo. I have tried exposures without my astronomik lpr filter taken out of the camera as well and this made no difference.
All the corrector plate did look a bit misty when a light is shone over it...there are no suspicious marks on there however. Would any slight mistiness produce the effect on my earlier images.
I dont like cleaning corrector plate as i have heard its better to leave them unless really bad. The telescope is about a year old and not used excessively and is well looked after. I would be interested to know if enthuisasts of astrophotography clean the corrector regular to produce better images.If so what would be the best way of doing this.
The corrector plate looks spotless after any mistiness clears when brought inside.
Philip
I think i may be finding the fault. The secondary mirror inside has like a misty off centre concentric smear covering about half the mirror. This shape is very similar to the halo in the images. I have took the eyepiece end off to let some air in but after 45 mins its still the same size.Any suggestions how to get rid of this.
philip59Nebula
Posts: 9
Joined: Thu Oct 27, 2011 8:31 am