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IDAS 6nm OIII

firstlightoptics.com/.../idas-6nm-oiii-narrowband-filter.html
Frozen as ambiguous
TypeOxygen-III (OIII)
SizeOther
Bandwidth6 nm
Users 17
Images 59
Most often used with

There doesn't seem to be anything here.

Also available in the following variants:
2"
50 mm
52 mm