Skip to product information
1 of 5

Optolong

Optolong 2" L-Quad Enhance Filter

Optolong 2" L-Quad Enhance Filter

Regular price $229.00 USD
Regular price $229.00 USD Sale price $229.00 USD
Sale Sold out

FREE SHIPPING

Product

Discover the wonders of the night sky with the Optolong 2" L-Quad Enhance Filter, a cutting-edge quad bandpass light pollution suppression filter designed for color cameras. Elevate your astrophotography experience with this advanced filter that effectively combats the impact of light pollution, offering stunning results with enhanced contrast and intricate celestial details.

Optolong 2" L-Quad Enhance Filter

Discover the wonders of the night sky with the Optolong 2" L-Quad Enhance Filter, a cutting-edge quad bandpass light pollution suppression filter designed for color cameras. Elevate your astrophotography experience with this advanced filter that effectively combats the impact of light pollution, offering stunning results with enhanced contrast and intricate celestial details.

Key Features:

  1. Light Pollution Suppression: The L-Quad Enhance Filter (L-QEF) cuts out unwanted light pollution from mercury and sodium lamps, providing a clean and broadband image with minimal color cast.
  2. Signal-to-Noise Ratio (SNR): Benefit from improved SNR, ensuring your astrophotographs showcase clear and detailed images.
  3. Near Infrared Cut-Off: With a cut-off to 1000nm, the L-QEF reduces the effects of infrared noise, contributing to cleaner and more precise shots.
  4. Quad Bandpass Design: The quad bandpass design maximizes the color balance of nebulae, galaxies, and other broadband spectral targets, making it ideal for a wide range of deep-sky astrophotography.
  5. Resistance to Light Pollution: With over 90% transmittance of nebula emission lines at H-Beta/OIII/H-Alpha/SII, and cut-off depths ranging from OD2 to OD4, the L-QEF significantly increases resistance to light pollution, suitable for night skies from Bortle 1 to Bortle 7 levels.
  6. Versatile Applications: Suitable for wide-field astrophotography, capturing the beauty of the Milky Way in Summer and Winter, as well as deep sky objects such as nebulae, galaxies, and star clusters.

Spectrum and Characteristic:

  • Substrate: Optical glass
  • Thickness: 1.85mm
  • FWHM: Quad bandpass filter
  • Blocking Range: 300-1000nm
  • Blocking Depth: OD2-OD4
  • Surface Quality: 60/40
  • Transmitted Wavefront RMS: λ/4
  • Parallelism: 30s
  • Size: 2" Inch

Coating Technology:

  • Multi-Layers Anti-Reflection Coating: Enhances light transmission for optimal image quality.
  • Non-Cementing Optical Substrate Coating: Ensures durability and resistance to scratching.
  • Ion-Assisted Deposition Coating Technology: Precision coating for stability on CWL (central wavelength), unaffected by temperature changes.
  • Planetary Rotation System: Offers precision and homogeneity of coatings, ensuring high value on transmission of pass-band and optical density of off-band.
    Optolong 2" L-Quad Enhance Filter Chart Graph

    How to Read the Chart:

    • The horizontal axis represents Wavelength in Nanometers (nm).
    • The vertical axis represents transmission in %.

     

    L-QEF

    Experience the next level of astrophotography with the Optolong 2" L-Quad Enhance Filter. Save time during your shooting process while obtaining incredible results and uncover the beauty of the night sky like never before.

    View full details

    More Optolong 2 Inch Filters

    More Optolong