A dual narrowband filter, eg one that passes Ha and O3 will go better whan an OSC camera then just Ha as there will be some signal from the green and blue pixels.
A fancier option is a quadband filter that passes Ha, S2, O3 and H beta, with 4 to 5 Nm passbands, review here
https://astrobackyard.com/opt-triad-ultra-filter/
If they had a clip in model Id consider it as it would be behind my OAG pickoff prism.