Optolong L-Quad Enhance 2 Inch Filter 10289 through the use of a

through the use of a complex 20 layer dielectric coating stack

the bracket angle is adjustable to accommodate the most accessible viewing angle for your setup

Substrates are free of striae and planeparallel polished to within 30 seconds of arc

For telescopes

The minimum tripod height has also been lowered per user feedback

Optolong L-Quad Enhance 2 Inch Filter 10289 through the use of aOptolong L Quad Enhance 2 Inch Filter L QEF cuts out light pollution from mercury and sodium lamps and produces a nice broadband image with minimal colour cast. This filter is a broadband filter that suppresses light pollution wavelengths. It is good for star clusters, dark and reflection nebulae, and galaxies from light polluted skies. L Quad Enhance Introduction L Quad Enhance Filter (L QEF) is a quad bandpass light pollution suppression filter for