Optolong L-Pro Filter
2 inch

The Optolong L-Pro filter is a light pollution multiband filter designed to reduce the effect of light pollution while offering a great white balance.

• It blocks the artificial light from mercury vapour lamps, both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).
• Maximum transmission of the main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm).
• Five transmission bands for an optimal colour balance.
• It can also be used for visual observations as well as for astrophotography.
• Ideal for sub-rural areas with moderate light pollution.
• It incorporates an IR/UV-Cut filter that is necessary in astrophotography, especially for astronomy cameras that are sensitive to the infrared radiation.
• Ultra-thin filter cell to maximise the compatibility with most filter wheels.
• Multi-layers anti-reflection coating.
• Cell in Aerometal Material, CNC machined, sand blasted, black anodised and laser engraved.
• Plastic PP Case, high pressure EVA Case Lining.

$339

2 year Manufacturer's warranty

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