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

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

Available in 7 days

€467,90 EUR
€467,90 EUR
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The ZWO H-alpha, SII, OIII 7nm narrowband filters are designed for astrophotography, enabling the capture of images with quality comparable to the Hubble Space Telescope. By selectively filtering wavelengths, these filters eliminate stray light from streetlights and the Moon, providing high contrast for many nebulae.

  • Bandwidth: FWHM 7nm (+/-0.5)
  • Transmission: 90% on Ha/S-II/O-III lines, cutoff in the infrared (700/1100nm)
  • High-quality Schott glass, 1.85mm thick
  • 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 slip-on and 31mm / 36mm circular unmounted
  • Significantly improves the contrast of nebulae
  • Reduces urban and lunar light interference
  • High optical precision for detailed images
  • Great robustness due to CNC-machined aluminum construction
  • Compatible with CCD imaging systems and digital photography with modified housings
  • ZWO H-Alpha, S-II, and O-III 7nm filters
  • CNC-machined aluminum cell
  • Documentation included

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