I am using a ASI1600MM-C for nearly one year with great success. Last month I discoverd a very strange behaviour around bright stars. Estimations of the light path lead to the conclusion that it is
scattered light from the cover glass or the chip itself. Reflected by the filters in the filter wheel.
It is mostly seen with reflectors, and occured with ZWO and Baader filters (in right direction). It is seen heavy on narrowband filters but is still present on broadband LRGB-filters.
Is there a replacement glass available or a trick to reduce this strange backscattered light
Vega 60s with a 8" f/5 Newton, Baader H-Alpha Filter
Chip-or-Cover-Glass-Reflexion.jpg [ 477.89 KiB | Viewed 115 times ]