The Baader Long pass goes from 600nm -1200 nm and beyond.
This is good, but a filter that would be short-band, for example 130 nm might be better.
But I have no experience with this because I do not have them.
The camera you want to use is very important to observe methane rays.
This must be very sensitive between 600-750nm. The ZWO Camera ASI 224 MC Color is unfortunately an RGB camera but is sensitive in that area. Profit can be achieved in the right camera.