Optolong L-Ultimate 2” Dual Bandpass Light Pollution Reduction Imaging Filter astrophotography aplus-module-2-heading { padding-bottom: 20px

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helping you capture the detailed features of celestial objects

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Light Pollution Resistance: Effectively cuts off emission lines from mercury lamps

1 Spectrum 2 Bortle6 3 Use with SV555 telescope 4 Product Size 5 M33 real shot pictures

Optolong L-Ultimate 2” Dual Bandpass Light Pollution Reduction Imaging Filter astrophotography aplus-module-2-heading { padding-bottom: 20pxIntroduction It's about a 3nn dual band designed to drastically reduce the effect of light pollution, the 3nm isolates the nebulae's emissions into H Alpha (red) and Olll (green blue). It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high and low pressure sodium vapor lights, and unwanted natural light caused by the emission of neutral oxygen in our