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SV227 SII 5nm 2" Filter Narrowband Astronomical Photographic CCD Filter for Deep Sky

SKU: W9187DA-
US$ 149.99
  • The SV227 SII filter blocks infrared wavelengths from 700nm to 1000nm so you don't need a separate IR-Cut filter;
  • 2 inch mounted; the filter can thread directly into the 2 inch barrel of your telescope eyepiece;
  • 300-1000nm wavelength range; the SVBONY SII 5nm 2" Filter transmits a 5nm bandwidth of light that is centered at 672nm;
  • This SII narrow band filter reduces other transmissions; including wavelengths of light that are responsible for light pollution;
  • The narrow bandwidth and high transmission rate of this filter will make you experience a major boost to contrast.

Note: This OIII filter is NOT for use on the Sun, and is also unsuitable for telescopes with a focal ratio below F/5. 

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1 reviews

Write a review

Very good

Filter does its job, I use it with imx492 sensor and get very decent results under bortle 7-8 sky

Model SV227
Type SII Filter
Size 2-Inch
Wavelength Range 300-1000nm
CWL 672nm
FWHM 5nm
Peak Transmittance ≥90%
Substrate Thickness 1.85mm
Wavelength Range 300-1000nm
Blocking ≥OD5
Clear Aperture 44mm
Surface Quality 60/40
Surface Pparallelism 1/4λ
Parallelism 30"
Thread M48x0.75
Single Thread Yes
Net Weight 12.5g / 0.44oz/0.027lb

Features

  • 1. SII CCD narrow band filter reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural)
  • 2. 300-1000nm Wavelength Range; the SVBONY Sulfur II 5nm Extra Narrowband Filter transmits a 5nm bandwidth of light that is centered at 672nm
  • 3. German imported glass; multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition
  • 4. CNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading
  • 5. 1.25 inch mounted; metal filter cell threads directly into the 1.25 inch barrel of your telescope eyepiece

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