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Optolong

SII Narrowband Filter 1.25"

SII Narrowband Filter 1.25"

Regular price $289.00
Regular price Sale price $289.00
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SII-CCD 6.5nm Deep Sky Imaging Filter 1.25"

Extra narrowband SII-CCD 6.5nm filters (suitable for CCD) are designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Main Use and Performance

  • Use with H-alpha and OIII-CCD extra narrowband filters (SHO Set) for tricolor CCD astrophotography
  • Narrowband imaging with SHO set can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks
  • The Hubble Space Telescope look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous Pillars of Creation (M16 Eagle Nebula)
  • Narrowband filters do not eliminate the effects of light pollution or increase the object's brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula..

Format

This filter is sized to fit a 1.25" filter wheel or eyepieces.






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