Hello everyone, long time lurker - posting for the first time! I am looking for some help on the issue below.
I have been using a ZWO ASI1600MM-pro with Astronomik filters for a while now and have had an issue with my stars ever since I switched to mono. My raw subs show bloated/out of focus stars taken through my red and luminance filters and tighter stars in my blue subs. Green stars are somewhere in between. NINA seems to confirm this, as even when autofocused the HFR readout shows a higher value for red than green or blue.
I've attached a google drive link with some fits files of individual subs that demonstrate the issue, calibrated and uncalibrated.
I thought the issue would be resolved when linear-fitting the data in post, but that didn't seem to help as my final images always have bloated red stars across the field.
I've also tried manually focusing with and without my EAF to no avail.
All data is acquired using NINA
Skywatcher Esprit 80 with field flattener, Skywatcher Eq6-r, ZWO ASI1600mm-pro, Astronomik Deep sky RGB filters with L-2 luminance, Astronomik 6nm OIII HA SII, ZWO EAF autofocuser, ZWO ASI120mm guide camera, Meade 80mm adventure scope as a guide scope
Sorry if I am posting in the wrong forum, I wasnt sure if this was a general or equipment related question. Also please let me know if there is any other information I can provide/have left out. Any help would be appreciated!
Edited by Griglia, 17 October 2019 - 07:41 PM.