iOptron SII 1.25″ Filters

iOptron SII 1.25" Filters: SII narrowband filter of 7 nm

This narrow-band filter isolates the deep red light of ionized sulfur around 672 nm. Supernova remnants and the sulfur-rich edges of emission nebulae reveal structure and texture here that remain hidden with other filters.

The 7 nm full width at half maximum blocks light pollution and moonlight almost completely, making it possible to photograph this faint channel from the city as well.

Masterpiece of the Hubble palette

Together with H-alpha and OIII, SII completes the classic SHO distribution in which the Hubble images were taken. The 1.25-inch aluminum cell fits into standard filter wheels.

Included

• SII filter, 1.25" mounted

Featured accessories

Combine with the iOptron H-alpha and OIII filters for the full Hubble palette.

For whom yes and for whom no

• ✓ Monochrome photographers who want to build the full SHO palette
• ✗ Beginner narrowband photographers: start with H-alpha, that channel gives the fastest results

Specifications

You can find more mounts and accessories for this brand at the iOptron brand page.