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New Optolong Filter 2-inch L-Quad Enhance Filer Professional L-Quad Enhance Filter (L-QEF)

4.7 (6) Write Review
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$188.00

$ 77 .99 $77.99

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About this item

  • L-Quad Enhance Filter is a quad bandpass light pollution suppression filter for colour cameras. It 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 effectively enhancing the contrast and details of the celestial bodies, and making the objects more distinct and stereoscopic. This filter provides better
  • ▲Better suppression of starbursts; Higher contrast and more details of the celestial bodies; Better colour saturation; Better signal-to-noise ratio (SNR); ▲Near IR cut-off to 1000nm, reducing the effects of IR noise; ▲L-QEF has more than 90% transmittance of the nebula emission lines at H-Beta/OIII/H-Alpha/SII, with cut-off depth from OD2 to OD4, thus providing a significant increase in resistance to light pollution. L-QEF is good for night sky from Bortel 1 to Bortel 7 levels; (Bortel 8, Bortel


L- Quad Enhance Filter Spectrum: Based on the characteristics of celestial bodies’ emission lines and light pollution emission lines, L-Quad Enhance filter effectively reduces the impact of light pollution and suppresses the background light of astronomical objects, thus effectively enhancing the contrast and details of the celestial bodies. Using L-QEF filter can help you save a lot of time during the shooting process, yet obtaining incredible results.


James Long
2025-08-07 15:10:51
I live in a bortle 6 area and the other night I was able to "visually" see the Dumbell nebula "M27" through this filter. I've never seen it from my backyard before in any scope.
Steve
2025-07-20 13:00:54
This filter really does the trick and works as advertised. A must have for any serious astrophotographer
Daniel Bordelon
2025-07-14 13:06:46
Probably one of the best broadband filters I've used this was 30 minutes on the rosette and Horse Head with a 65mm quintuplet refractor. Have not tried any broadband targets but based off of reviews on YouTube it'll do the trick.
Adán Ugarte Pineda
2025-05-29 17:53:32
Muy bueno para suprimir contaminación lumínica de baja a moderada (hasta Bortle 6)
NICK
2025-05-14 15:58:04
I have not used the filter as yet, but top notch quality as expected from Optolong can be seen, and Amazon delivered as promised, well packaged and secure.
RAFAEL SANCHEZ A.
2025-02-19 13:54:49
Permite tomar fotos de espacio profundo aun estando en plena ciudad con contaminación lumínica Bortle Clase 7 a 8.