Hi all.
Ive noticed a blue ring around bright stars eg sirius. Check the picture bellow. this is sirius at prime focus and the ring around the star would cover about 1/2 the width of the image. (sorry about the crop - its not ideal but i didnt know how else to reduce the image size bellow 200Kb as it was shot in RAW mode).
Im using a lx200 acf 12" and the ring is there whether its through the eyepiece or photographicaly. Does anyone know the source of this.
I was browsing Paul Haese's website, and noticed
here that he had something simillar. Do you think its caused by the same thing?
thanks
Josh