ZWO 1.25'' Ha SII OIII 7nm Narrowband Filter Set
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ZWO 1.25" Ha SII OIII 7nm Narrowband Filter Set

£343.00✓ 2 year warranty

:  

In stock shipped 1-2 working days.

About this product

Model:  zwo_hso7_125
Part Number:  ZWO-HSO7-1.25SET

New & Improved with higher light transmission and less reflection (reduced halos around bright stars). 

Ha 7nm

Has a bandwidth of 7nm and passes light at 656nm wavelength. 

OIII 7nm

Has a bandwidth of 7nm and passes light at 500nm wavelength. 

SII 7nm

Has a bandwidth of 7nm and passes light at 672nm wavelength.

FEATURES

  • 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
  • Around 90% transmission at selected wavelengths
  • Infrared wavelength 700-1100nm cut-off
  • <0.1% transmission of off-band, OD3 (Optical Density)

Transmission Curve

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