Hutech Astronomical Products - IDAS NBN Filters

IDAS Narrow-Band Nebula (NBN) Filters
for Visual Use and Monochrome Imaging

	Nominal filter response plot. Click for a detailed view.
The IDAS Narrow Band Nebula Photo-Visual (NBN-PV) filter is a new filter design using the IDAS-unique Multi-Bandpass Technology (MBT). This allows the creation of a filter with very narrow passbands around both the H-Beta / O III emission lines, and the H-alpha / N II / S II emission line groups. This combines the high contrast views of narrowband filters with the convenience (and economy) of covering all of the important nebula emission lines in a single filter. The resulting filter is great for visual use or monochrome imaging of emission nebulae.
Click on the spectral plot below for a closer look at the response of an actual production filter. A spectral plot of the filter batch is provided with each NBN filter.
Production filter spectral plot sample. Click for a detailed view.
For special applications requiring isolation of the H-Beta or OIII sub-bands, consider the PassBand Modifier (PBM) filters. These are meant to be used in conjunction with an NBN filter or similar filter.