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SII Filter 7nm ZWO 36mm Circular Non-Mounted - ZWO

SII Filter 7nm ZWO 36mm Circular Non-Mounted - ZWO

Available within 7 days

€192,90 EUR
€192,90 EUR
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The ZWO S-II 7nm narrowband filter of 36mm is specially designed for astrophotography, optimizing observations at a wavelength of 672nm. Compatible with other filters such as H-Alpha and O-III, it allows for 'Hubble-like' quality images by significantly enhancing contrast and eliminating the effects of urban lighting.

  • Bandwidth: FWHM 7nm (+/-0.5)
  • Transmission: 90% on the S-II line (672nm)
  • Cutoff in the infrared (700/1100nm)
  • High-quality Schott glass
  • Glass thickness: 1.85mm
  • Precise optical polishing ensuring a wavefront accuracy of lambda/4
  • Parallelism <30" arc on both surfaces
  • Double-sided optical coating for anti-reflection treatment
  • CNC machined aluminum cell construction
  • Significantly enhances the contrast of nebulae
  • Reduces light interference from street lighting
  • Compatible with CCD imaging systems and modified cameras for advanced astrophotography
  • Eliminates unwanted wavelengths for sharper images
  • Visual observation (rural sky): Incompatible
  • Visual observation (urban sky): Incompatible
  • Film photography: Incompatible
  • CCD imaging: Excellent for enhancing nebula contrast
  • Digital photography (unmodified camera): Good, although the sensitivity of unmodified sensors is reduced in SII
  • Digital photography (modified camera): Excellent for enhancing nebula contrast
  • Webcam/Video (planetary): No interest
  • Webcam/Video (deep sky): No interest

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