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Ha, SII and OIII 7nm Filter Set 31.75mm - ZWO

Ha, SII and OIII 7nm Filter Set 31.75mm - ZWO

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€452,90 EUR
€452,90 EUR
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The ZWO H-alpha, SII, OIII 7nm narrowband filters are designed for astrophotography, allowing for images of quality comparable to the Hubble Space Telescope. By selectively filtering wavelengths, these filters eliminate light pollution from streetlights and the Moon, offering high contrast for many nebulae.

  • Bandwidth: FWHM 7nm (+/-0.5)
  • Transmission: 90% on Ha/S-II/O-III lines, cut-off in the infrared (700/1100nm)
  • High-quality Schott glass, thickness of 1.85mm
  • Precise optical polishing with a parallelism <30" arc
  • Double-sided optical coating with anti-reflective treatment
  • CNC machined aluminum cell construction
  • Available in 4 formats: 31.7mm / 50.8mm nosepieces and 31mm / 36mm unmounted circular
  • Significantly improves nebula contrast
  • Reduces urban and lunar light interference
  • High optical precision for detailed images
  • Great robustness thanks to CNC machined aluminum construction
  • Compatible with CCD imaging systems and digital photography with modified housing
  • ZWO H-Alpha, S-II, and O-III 7nm filters
  • CNC machined aluminum cell
  • Documentation included
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