Please note: Last regular shipment before Christmas is on December 19, 2024, after which only express shipments can be sent. Our store is closed on Christmas Eve and New Year's Eve. (Close)
The O-III line at 501nm is an important emission line of many Nebula objects and SN remnants. An extreme background contrast can be achieved even in urban areas with narrow-band filters.
The Altair Astro Premium Oiii 6.5nm filter is designed for astro imaging
of nebulae with Mono CCD or CMOS cameras, blocking light pollution by
cutting out the light pollution wavelengths. The filter blocks UV IR and
has an anti-reflection AR coating.