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.
A spectral plot of the filter batch is provided with each NBN filter.

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.

NBN mm Price £
PV48 £145.00
PV48SCT £179.00

PBMO-28.6 £51.00
PMBB-28.6 £51.00
PMBO-48.0 £68.00
PMBB-48.0 £68.00

The Astronomy Shop

1 Tone Hill. Wellington

Somerset TA21 0AU

United Kingdom

Telephone: +44 (0)1823 665510