Astrophotography Filter, SII, 672.4nm, 7.7nm, 31mm diameter

Chroma Technology Astronomy Filter

Manufacturer's part number :


Manufacturer CHROMA TECHNOLOGY Fluorescence Filters

Chroma Technology

Description :

The SII/8-31 model is a precision band pass filter with a transmission more than 93% at 672.4nm with a nominal bandwidth of 7.7nm. This SII/8-31 band pass filter for astrophotography application is 31mm diameter size.

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  • Central wavelength: 672.4nm
  • Transmission more than 93%
  • Nominal bandwidth (FWHM): 7.7nm
  • Dimensions: 31mm diameter
  • Durable sputter coatings
  • Filters designed for use with CCD and for f/4 or slower
  • Transmitted wavefront better than 0.25 waves/inch
  • Parallelism <30 arcsec
  • Thickness: 3.0 +/-0.05mm
  • Benefits

  • Extremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate in central wavelength and ban pass adherence
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Filters Type Band pass filter  

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