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Optolong IR Pass 685nm Filter

RM 255.00

Optolong IR 685 Filter

Optolong IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths

The sensor of CCD or CMOS cameras is capable of detecting light in the 350-1100nm range including infrared wavelengths. Thus RGB planetary images taken with IR as the luminance channel have visible-enhanced contrast and surface detail than standard LRGB images


Reference Spectrum


This curve is only for reference, and is not used as the final product data.





Coating Technology

  • Multi-layers anti-reflection coating
  • Non-cementing optical substrate coating
  • Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.
  • Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.

Contact 011-11230602 For More Information. Available In Stock, 100% Original Local Unit With Full Warranty And Aftersales Service