7nm Dual-Band SII OIII Nebula Filter for Astrophotography

Capture stunning nebula detail even in bright, light-polluted skies with the 7nm Dual-Band SII & OIII Nebula Filter. Designed for deep-sky enthusiasts, this precision optical filter isolates the most important emission lines, revealing structure, color, and detail that are often lost to urban glow or moonlight. Ideal for One-Shot Colour (OSC) cameras, it allows you to image nebulae in a single shot without swapping filters.

Key Features:

• Dual-band SII & OIII design for striking nebula detail in one exposure

• 7nm narrowband for reduced sky glow and enhanced contrast

• High peak transmittance (≥88%) for brighter, more detailed images

• Perfect for OSC cameras—no stacking required

• Effective under heavy light pollution, ideal for suburban or city imaging

• Precision optical glass ensures sharp, distortion-free results

• Available in 1.25" and 2" sizes for most telescopes

Specifications:

• Filter Type: Dual-band SII & OIII narrowband

• FWHM: 7nm

• Peak Transmittance: ≥88%

• Blocking: ≥OD5

• Clear Aperture: 26mm / 44mm

• Sizes: 2"

• Thread: M28.5×0.6 / M48×0.75

• Substrate Thickness: 1.80mm / 1.85mm

• Surface Quality: 60/40

• Wavelength Range: 300–1000nm

• Single Thread: Yes

Package Includes:

• 1 × 7nm Dual-Band SII & OIII Nebula Filter

• 1 × Protective Storage Case

Why It’s a Smart Buy:
This dual-band filter empowers astrophotographers to capture impressive nebula images without dark-sky trips or additional equipment. Its combination of high contrast, vibrant colors, and compatibility with common camera setups makes it an excellent choice for both beginners and advanced imagers.