Here's a fun way to find out if you like this sort of thing. Order the cardboard spectrometer kit, or better yet the plastic assembled one, from these folks. www-dot-starlab-dot-com. Calibrate accoring to their instructions and just check out your filters. I have one of these, they are not precision instruments but do show the peaks on my filters quite nicely. The O-III filter should show a single peak.
Jim
Jim