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Optolong L-Quad Enhance Filter (L-QEF)

Optolong L-Quad Enhance Filter (L-QEF)

Regular price $229.00 USD
Regular price $229.00 USD Sale price $229.00 USD
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Elevate your astrophotography experience with the Optolong L-Quad Enhance Filter (L-QEF). Crafted with precision and innovation, this quad bandpass light pollution suppression filter is your gateway to capturing the cosmos in breathtaking detail. Here's why the L-QEF stands out among filters in its class:

Optolong L-Quad Enhance Filter (L-QEF)

Key Features:

1. Light Pollution Suppression: The L-QEF is engineered to cut out light pollution wavelengths emanating from mercury and sodium lamps. Experience stunningly clear, broadband images with minimal color cast, allowing you to focus on the celestial wonders without interference.

2. Enhanced Contrast and Detail: By suppressing unwanted light pollution and natural skylight-induced effects, the L-QEF enhances contrast and details of celestial bodies, rendering them more distinct and stereoscopic. Whether you're capturing star clusters, dark nebulae, or galaxies, expect unparalleled clarity and depth.

3. Broadband Spectral Targets: Versatility is at the heart of L-QEF. Covering most nebulae, galaxies, star clusters, and reflected/emitted line signals, this filter provides higher contrast and rich details while maintaining excellent color balance. Your deep sky targets come to life with vivid precision.

4. Technical Excellence:

  • Transmission of Nebula Emission Lines: L-QEF boasts over 90% transmittance of H-Beta/OIII/H-Alpha/SII, ensuring a significant increase in resistance to light pollution.
  • Blocking Range: Effectively blocks wavelengths from 300-1000nm with a cut-off depth from OD2 to OD4.
  • Optical Quality: Manufactured from optical glass with a thickness of 1.85mm, maintaining superb surface quality (60/40) and parallelism (30s).
  • Coating Technology: Multi-layers anti-reflection coating, non-cementing optical substrate coating, and Ion-assisted deposition coating technology ensure durability, scratch resistance, and stable performance under varying temperatures.

Optolong L-Quad Enhance Filter

5. Easy Compatibility: Designed as a 2-inch filter (50.8mm) with an M48×0.75 thread, the L-QEF fits seamlessly into your astrophotography setup, allowing you to focus on capturing celestial marvels.



Immerse yourself in the beauty of the universe without the hindrance of light pollution. With the Optolong L-Quad Enhance Filter (L-QEF), your astrophotography journey reaches new heights. Capture the stars, nebulae, and galaxies in exquisite detail, revealing the universe's secrets with unmatched clarity. Don't miss this opportunity to transform your night sky visions into extraordinary photographs. Experience the cosmos like never before – order your L-QEF filter today.

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