Hey everyone, I hope you're doing well today!
I was gifted the Antlia Quad Band for Christmas. I was very excited to get out and use it after months of terrible weather, only to find it produces some of the NASTIEST halos I've ever seen...
I double checked filter orientation was correct following Antlia's instructions. My other filters do not exhibit the same issues. I've seen it recommended to flip the filter regardless of the side the anti reflection coating is on, but I'm not too sure how accurate that is. Unfortunately, I am unable to flip the filter inside my filter wheel due to its thickness. I am also unable to flip the filter wheel as I have a thin adapter currently stuck on one side, which prevents me from attaching to my gear scope side, so I have not tested it flipped around.
Here's an example of the Horsehead at 30s exposures. One ~3hr integration and one individual sub. The massive halo around Alnitak is very faint in the individual subs, I did not notice it until after stacking. Any ideas on if I just got a bum filter, or do we think there's something else going on? I understand most filters will have halos around Alnitak, but this doesn't look normal to me when compared to others with the same filter, or any other filter in general!
Edited by LiquidMan, 26 February 2024 - 11:57 PM.