ToupTek LRGB + SHO Narrowband (6.5nm) Filter Set for 1.25"

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)

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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

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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

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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

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Intended Use: Suitable for mono astrophotography cameras to isolate emission lines (SHO) or capture broadband color (LRGB) with reduced light pollution effects.