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Hi, I just published a video of how I am cleaning my filters - I thought I might do this while my telescope is back at service due to some kind of astigmatism.
How do you guys clean your filters? it seems that every dust particle finds it way to the filters just as you are done cleaning them, and to sit in a damp bathroom seems kind of a mess...
Anyway, here is the video
First night - missed the target and took lots of images of some nearby stars
Second night - 35 x 2 min
Third night - 60 x 2 min
I've tried stacking the two nights separately and all together to give a total of 3 hours, but the stacked images all turn out roughly same. Think I must be limited somewhere else and the extra data isn't being captured. The best of the batch was a very quick process of night 3, 2 hours. I was happy to see the bubble shape and a bit of cloudy bits 👍
Bresser AR 102/600 - Bresser HD camera - Stacked in Siril, simple process in Pixinsight
By inFINNity Deck
As I have replaced them with new-style versions, I have two old-style ZWO 36mm unmounted narrowband filters for sale:
They are pre-2018, so with both sides silver instead of yellow&purple, and come in the original, but opened, packaging. Condition like new.
Attached images have been made with them. Any decent price will do.