SVBONY S-II 1.25" SV160 7 nm Astrophotography Filter

Svbony

W9122A

£89.99

Quantity

SVBONY S-II 1.25" SV160 7 nm Astrophotography Filter

The SVBONY S-II 1.25" SV160 7 nm Filter is a professional astrophotographic filter designed to isolate the ionized sulfur (S-II) emission lines at 671.6 nm and 672.4 nm. With a narrow Full Width at Half Maximum (FWHM) of 7 nm, it delivers outstanding contrast and precision when imaging emission nebulae under light-polluted skies.

Main Features

  • High-precision bandpass filter optimized for the S-II emission line
  • Made from premium optical glass substrate (B-270)
  • Ion-assisted multi-layer coating for durability and wavelength stability
  • Excellent suppression of mercury and sodium lamp emissions
  • Half bandwidth (FWHM): 7 nm
  • Maximum transmission: 80%
  • Not recommended for visual or solar observation

Technical Specifications

Filter Type: Bandpass Filter
Substrate: Optical Glass B-270
Filter Diameter: 1.25"
Optical Diameter (Aperture): 26 mm
Filter Thickness: 1.85 mm
Pass Bands: S-II (671.6 nm, 672.4 nm)
Central Wavelength (CWL): 672 nm
Half Bandwidth (FWHM): 7 nm
Maximum Transmission: 80%
Blocked Light Pollution Bands: Mercury (435.8, 546.1, 577–578.1 nm), Sodium (589.6, 598, 615.4–616.1 nm)
Optical Density: OD3 (300–1000 nm)
Coating: Multi-layer coating (MC)
Surface Quality: 60/40 (MIL-O-13830)
Flatness: λ/4
Parallelism: <30″
Weight: 5.5 g

Included in the Box

  • SVBONY S-II SV160 1.25" 7 nm Filter

    • ⚠️ Note: This filter is not suitable for visual or solar observation.

SVBONY S-II 1.25" SV160 7 nm Astrophotography Filter

£89.99

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