Current Price: $269.00
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All filters in perfect condition!
Some of my original pictures in listing, others in gallery: http://astrofotky.cz/~dansemacabre

Technical Data

  • Size: D=36mm
  • Thickness: 2mm
  • FWHM?7±0.5nm
  • Glass Thickness 2.0+/-0.03 mm  (1.25”/31mm/36mm)
  • Fine-optically polished to ensure accurate 1/4 wavefront  over the both surfaces
  • About 90% transmission at H-alpha line 656nm (H-Alpha filter )
  • About 90% transmission at SII line 672nm (SII filter )
  • About 90% transmission at major OIII line 500nm (OIII filter )
  • Infrared wavelength 700-1100nm cut-off
  • <0.1% transmission of off-band, OD3(Optical Density)

Filed under: Eyepieces & Accessories