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I have also been given a damaged HA filter (Arrived damaged in transit) so I am going to give that a try. It arrived with a crack in it but it is a 2" filter and I am using an APS-C sensor so if I am lucky the crack will be out of sight. I guess flats will tell me if I am that lucky. Either way it will be an interesting experiment to see how the camera responds.
The plan is to go mono eventually so if either NB or dual band work well I may buy one of either plus a filter wheel and a lum filter (to keep things parfocal) to get some of the NB benefit while spreading the cost of gear out (And automating filter changes) understanding of course that a dual band filter will become useless if I go mono.
APP has some specific debayer algos for NB or dual band with an OSC so it will be interesting to try them out.
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