IDAS Passband Modifier Filters are designed to be used
in conjunction with medium- and narrow-band nebula filters
to isolate the H-Beta or O-III emission lines. Using these
economically priced passband modifier filters results
in a filter combination that duplicates the performance
of separate, more expensive single-band filters.
Response curves of the Passband Modifier filters.
Click on the plot for a full-sized view.