IDAS HEUIB-II Filter - Besides removing the IR and UV ends of the spectrum which are often out of focus in refractive optics, it isolates the common H-alpha line relative to the surrounding extreme red end of the spectrum, making it easy to bring out the faint H-alpha emission nebulosity of astronomical photos, yet retain the background color balance of broadband photos.

IDAS LPS-D3 Filter - The IDAS LPS-D3 filters enhance the contrast of astronomical emission nebulae against a sky with both man-made and natural* sky glow sources, yet preserve the colour balance of broadband objects such as galaxies. As with other IDAS interference filters, the bandpasses are designed to accommodate the steep ray angles of fast optical systems.

Askar Colourmagic HA/OIII  & SII/OIII 6nm - The filter enables the capture of the three main emission nebulae bands using two diffent filters, whilst suppressing unwanted light pollution. It enables you to capture cleaner data and reduces the post processing efforts to isolate faint details from the background light pollution.

These use of these filters will allow you to HOS palette & enhance your standard broadbands images with increased H2 regions etc - What's not to like with that :)