The Chroma H-alpha 8 nm, S-II 8 nm, O-III 8 nm, Luminance, Red, Green, Blue 50 × 50 mm unmounted filter set is a complete filter set for astrophotography with monochrome cameras. It combines SHO narrowband filters, designed for imaging selected emission lines, with a classic LRGB set for luminance and colour channel imaging. The set can be used for imaging deep-sky objects, nebulae and planetary targets when selective and well-organised recording of individual image channels is required.

Key features

• complete seven-filter set for monochrome cameras
• includes H-alpha 8 nm, S-II 8 nm and O-III 8 nm narrowband filters
• includes LRGB filters: Luminance, Red, Green and Blue
• enables imaging in the classic SHO palette as well as luminance and RGB colour channel recording
• designed for imaging deep-sky objects, nebulae and planetary targets
• narrowband filters allow selected emission lines to be recorded selectively
• unmounted version in 50 × 50 mm format
• intended for demanding astrophotographic applications with monochrome cameras

Kit contents

• Chroma H-alpha 8 nm 50 × 50 mm unmounted filter
• Chroma S-II 8 nm 50 × 50 mm unmounted filter
• Chroma O-III 8 nm 50 × 50 mm unmounted filter
• Chroma Luminance 50 × 50 mm unmounted filter
• Chroma Red 50 × 50 mm unmounted filter
• Chroma Green 50 × 50 mm unmounted filter
• Chroma Blue 50 × 50 mm unmounted filter

Technical specifications

• manufacturer: Chroma
• product name: SII Ha OIII -8nm LRGB
• SKU / manufacturer part number: 27112
• set type: SHO narrowband + LRGB filter set
• number of filters in the set: 7
• narrowband filters included: H-alpha, S-II, O-III
• LRGB filters included: Luminance, Red, Green, Blue
• nominal transmission band of narrowband filters: 8 nm
• H-alpha line: 656.3 nm
• S-II line: approx. 672.4 nm
• O-III line: 500.7 nm
• maximum H-alpha transmission based on the manufacturer’s spectral data: approx. 96.5%
• maximum S-II transmission based on the manufacturer’s spectral data: approx. 98.7%
• maximum O-III transmission based on the manufacturer’s spectral data: approx. 94.5%
• filter dimensions: 50 × 50 mm
• format: unmounted

The Chroma H-alpha 8 nm, S-II 8 nm, O-III 8 nm, Luminance, Red, Green, Blue 50 × 50 mm set is a complete solution for astrophotographers who want to combine narrowband imaging with classic LRGB recording in one consistent filter system.