These are pretty new filters and are competing in the budget spot against Baader, ZWO, Astronomcis and the like.
So, I thought I'd do some quantitative testing to see how they perform with respect to halos as it seems to be one of the major concerns with filters in general.
I'll let your eyes be the judge and comment accordingly as these are the only narrow band filters I have experience with.
For reference, these run $209 ea for 1.25" mounted filters.
(images are cropped to the same scale)
Edited by DrGomer, 23 May 2020 - 12:32 AM.