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Optolong IR Pass 850nm Filter - 1.25" Mounted - IRPS850-125

SKU: OTL-IRPS850-125

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List price: $89.00

Our price: $57.85

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Optolong IR Pass 850nm Filter - 1.25”




The Optolong IR Pass 850nm Filter blocks wavelengths below 790nm and blocks wavelengths above 890nm to enhance contrast and surface detail and reduce the effects of seeing when used in IR-LRGB imaging of the moon and planets. Atmospheric seeing and distortion diminish as you move further away from visible light into the infrared, and since CCD and CMOS sensors are sensitive to IR light, imaging in the infrared will improve your results.



The IR Pass 850nm filter offers a 90% transmission at bandpass.



The Optolong 2” IR Pass 850nm Filter is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved.



Quality Filter Materials:



  • Schott B270 substrate material from Germany, 2.0mm thick

  • CNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading

  • Multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition


Optolong Filter Manufacturing Processes and Parameters




  • Surface quality, according to MIL-O-13830, is 60/40

  • 90% transmission at passband

  • High value transmission of pass-band and optical density of off-band is assured through Optolong’s planetary rotation system, a homogenous and precise coating procedure

  • Each filter comes with a plastic case with high pressure EVA case lining


About Optolong



Optolong is the Astronomy Filters division of Yulong Optics, an optical filter design and processing company out of Kunming, China that has provided filters for over 700 optical companies since 1999. All Optolong filters pass European Union RoHS requirements and have been certified by TUV Rheinland and Bureau Veritas.

Description
Description

Optolong IR Pass 850nm Filter - 1.25”

The Optolong IR Pass 850nm Filter blocks wavelengths below 790nm and blocks wavelengths above 890nm to enhance contrast and surface detail and reduce the effects of seeing when used in IR-LRGB imaging of the moon and planets. Atmospheric seeing and distortion diminish as you move further away from visible light into the infrared, and since CCD and CMOS sensors are sensitive to IR light, imaging in the infrared will improve your results.

The IR Pass 850nm filter offers a 90% transmission at bandpass.

The Optolong 2” IR Pass 850nm Filter is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved.

Quality Filter Materials:

  • Schott B270 substrate material from Germany, 2.0mm thick
  • CNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading
  • Multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition

Optolong Filter Manufacturing Processes and Parameters

  • Surface quality, according to MIL-O-13830, is 60/40
  • 90% transmission at passband
  • High value transmission of pass-band and optical density of off-band is assured through Optolong’s planetary rotation system, a homogenous and precise coating procedure
  • Each filter comes with a plastic case with high pressure EVA case lining

About Optolong

Optolong is the Astronomy Filters division of Yulong Optics, an optical filter design and processing company out of Kunming, China that has provided filters for over 700 optical companies since 1999. All Optolong filters pass European Union RoHS requirements and have been certified by TUV Rheinland and Bureau Veritas.

Specifications
Specifications
Model Number IRPS850-125
Filter - Single or Set? Single Filter
Filter Size 31.75 mm (1.25")
Filter Type UV/IR and/or Luminance
Filter Shape Round
Mounted or Unmounted? Mounted
Filter Warranty Two Years
What's in the Box?
What's in the Box?
  • Optolong 1.25" IR Pass 850nm Filter
  • Filter Case
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