Description

The Optolong SHO 6.5nm Filter Kit in 1.25-inch format includes three narrowband filters: Sulfur-II (SII), Hydrogen-alpha (Ha), and Oxygen-III (OIII), each with a 6.5nm bandpass. This combination is used for the popular Hubble Palette (SHO) imaging technique, which maps each narrowband emission to a color channel, revealing intricate gas structures in emission nebulae. The 6.5nm bandwidth provides strong signal isolation even from heavily light-polluted sites, making these filters ideal for dedicated mono camera astrophotography.

Explore these guides from our Astro Wiki to learn more about this type of equipment:

Narrowband Filters Guide → Filters for Astrophotography → Narrowband Processing →