L-Quad Enhance Filter (L-QEF)

L-Quad Enhance Filter (L-QEF) is a four-band light pollution suppression filter for color cameras. Effectively suppresses the transmission of light pollution wavelengths, especially light pollution generated by artificial lighting (including mercury and sodium lamps), as well as the effects of natural skylight-induced effects on the shot, thus improving effectively contrast and detail celestial bodies and making objects more distinct and stereoscopic. This filter provides better color balance while improving resistance to light pollution. L-QEF can be used for both wide-field astrophotography, such as the Milky Way in summer and winter, and deep-sky objects such as nebulae, galaxies, star clusters, and so on.

It allows you to save a lot of time during the shooting process and get better results at the same time. The quad bandpass design maximizes the color balance of nebulae, galaxies and other broadband spectral targets.

Main features:

• Eliminates light pollution from mercury and sodium lamps and produces a beautiful broadband image with minimal color cast;
  
  
• Signal to Noise Ratio (SNR);
  
  
• Near-IR cutoff at 1000nm, reducing the effects of IR noise;
  
  
• L-QEF has a transmittance greater than 90% of the H-Beta/OIII/H-Alpha/SII nebula emission lines, with cut-off depths from OD2 to OD4, thus providing a significant increase in pollution resistance light. L-QEF is good for the night sky from Bortel 1 to Bortel 7 levels; (Bortel 8, Bortel 9 environments are not recommended, please choose Optolong other narrowband filters, 3nm, 7nm type filters are available.);
  
  
• Suitable for a wide range of deep sky lenses: covers most nebulae, galaxies, star clusters, reflected and emitted linear signals, astronomical objects with higher contrast and rich details, maintaining excellent color balance. L-QEF is superior to other filters of the same type.
  
  

Spectrum and characteristics

Based on the characteristics of the emission lines of celestial bodies and the emission lines of light pollution, the L-Quad Enhance filter effectively reduces the impact of light pollution and suppresses the background light of astronomical objects, thus effectively improving the contrast and the details of celestial bodies. Using the L-QEF filter can help you save a lot of time during the shooting process while still achieving incredible results.

Some shots of our customers with the OPTOLONG L-QEF "L-QUEEN" filter