Hi Erik,
That image is an absolute textbook case of coma, pretty bad too I might add, I have never seen it so clearly exemplified
Check out 'coma optical aberration' with google images. One (or both) of the lenses is decentered, that's really bad luck.
EB
Quote:
Originally Posted by E_ri_k
Ok, so the problem persists, and the objective
appears clean and no traces of dew.
Managed some quick shots between the cloud. One out of focus, and Two as close as I can get in focus. It is a bit tricky as the aberration is quite strong.
Hope someone can shed some light on this. Spoke to Calude from AEC and I'm liking at over 1K for shipping and collimation by Takahashi.....
Erik
|