Optolong S-II Deep-Sky Filter 6.5 nm, 2

Optolong S-II Deep-Sky Filter 6.5 nm, 2" Filter Cell

Optolong S-II Deep-Sky Filter 6.5 nm, 2" Filter Cell

OPTOLONG

Suitable for photographing on faint emission nebulae in full moonlight or in severe light pollution, but also for obtaining narrowband tricolor images with the so-called "hubble look".

€240.00

Available within 5-14 days

Available within 5-14 days

This includes products that we do not keep in stock but are only available on request or have been announced by the manufacturer. For orders of these items, a deposit is required, proportional to the total value of your order. As soon as we receive your order, we will notify you by e-mail or telephone, for the exact delivery time and the amount of the deposit.

Availability: In stock
SKU
TSOPL-SII6-2


Optolong S-II Deep-Sky Filter 6.5 nm, 2" Filter Cell

Extra Narrowband SII-CCD 6.5 nm filter is designed for nebula observation allowing 6.5 nm bandwidth of light centered on a wavelength of 672 nm through, which corresponds to the [S II] emission line, 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 (skyglow).


Main Use and Performance

  • Suitable for photographing on faint emission nebulae in full moonlight or in severe light pollution
  • Hubble 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 imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks
More Information
Aperture (mm) 50.8
  • Substrate: High-quality optical glass from Schott
  • Thickness: 2.0 mm
  • Surface Treatment: Fine-optically polished
  • Surface Polish Quality: 60/40 (Refer to MIL-O-13830)
  • Surface Quality: 1/4 wavefront
  • Coating: Muti-coated
  • Cell: Filter cell 2", black anodized, laser engraved
  • Clear Aperture: 45 mm
  • Cell height: 5 mm without external thread, 7 mm with M48 external thread
  • Typical transmission off-band: 0.1% (OD3)
  • Centre wavelength [S II]: 672 nm
  • FWHM [S II]: 6.5 nm
  • Typical transmission [S II]: 80%
Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account
Crossell Products: