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Open Box ZWO 31mm OIII 7nm Filter

ITEM #
UT-13316
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  • Regular price $149.00
  • $109.00
  • You save: $40.00 (26%)

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  • This is an open box filter in like new condition

DESCRIPTION

Open Box ZWO 31mm OIII 7nm Filter

Passes 7nm bandwidth of light centered on a 500nm wavelength, which corresponds to OIII emission lines. All other light is blocked.

Adding a ZWO O-III Narrowband filter to your imaging collection will take you beyond RGB imaging and reveals your favorite nebulas in a totally new light, no matter how polluted your skies may be! 

  • FWHM: 7±0.5nm
  • Glass Thickness 2.0+/-0.03 mm (1.25”/31mm/36mm)
  • Fine-optically polished glass ensures accurate 1/4 wavefront over both surfaces
  • Approx 90% transmission at major OIII line 500nm
  • Infrared wavelength 700-1100nm cut-off
  • <0.1% transmission of off-band, OD3 (Optical Density)

SPECIFICATIONS

ConditionLike New
ManufacturerZWO
Warranty90 Day Covered By OPT

INCLUDED ITEMS

  • ZWO OIII 7nm filter
  • Plastic case, wrapping and outer box