IDAS HEUIB-II filter for Canon EOS with APS-C sensors

Besides removing the IR and UV ends of the spectrum which are often out of focus in refractive optics, the IDAS HEUIB-II filter 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 HEUIB-II filter for Canon EOS with APS-C sensors

This filter connect in simple way in the camera body of the Canon EOS DSLRs with APS-C sensor (it comes with installation manual), just in front of the camera mirror. It's fixed in position by adding a Canon EOS T2 or M48 ring.