IDAS SII Narrowband Filters tedastro 4 years ago IDAS SII Filters 6.3nm bandpass 48mm(2″) mounted, 52mm mounted, 36mm unmounted and 50.8 CFW available 2.5mm and 3mm thickness STD and UHS Comes with an individual measurement plot (except 36mm unmounted) Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook