ToupTek LRGB + SHO 1.25″ Filter Set
A complete filter kit for both broadband and narrowband astrophotography. This ToupTek set includes LRGB filters for natural color imaging and SHO filters (Hα, O III, S II) for capturing stunning Hubble-palette narrowband compositions. Ideal for use with monochrome CMOS or CCD cameras.
Filter Size: 1.25″ mounted (M28.5 × 0.6 mm thread)
Narrowband SHO Filters
Perfect for isolating key nebular emission lines to produce detailed, high-contrast narrowband images.
Bandwidth (FWHM): 6.5 nm for each channel.
- Hα: 656.3 nm
- O III: 500.7 nm
- S II: 671.6 nm
Broadband LRGB Filters
Engineered for accurate color reproduction and light pollution suppression in RGB imaging.
- Luminance: 420–690 nm
- Red: 595–695 nm
- Green: 495–580 nm
- Blue: 400–510 nm
General Specifications
- Peak Transmission: > 90%
- Optical Density (Blocking): OD ≥ 5.0 outside passband
- Substrate: 2 mm precision-polished quartz glass
- Coating: Ion-Assisted Deposition (IAD) multilayer coatings on both sides for stability and spectral precision
- Surface Quality: λ/4 wavefront error (P–V), < 40/20 scratch-dig
- Parallelism: < 30 arc seconds
- Reflections Control: Edge-blackened, AR-coated, glue-free mount
- Housing: CNC-machined anodized aluminum alloy cell
- Weight: ~18 g per filter
- Origin: ToupTek Photonics, China
Intended Use: Suitable for mono astrophotography cameras to isolate emission lines (SHO) or capture broadband color (LRGB) with reduced light pollution effects.
