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Optolong L-eNhance Filter
1.25 inch
The Optolong L-eNhance filter is a light pollution tri-band filter designed to drastically reduce the effect of light pollution. Its three passing bands isolate the nebulae emissions in H-Alpha (red) and H-beta, OIII (green-blue). This filter is designed for DSLR's and colour cameras under urban skies. It works as a combined H-Alpha and OIII / H-Beta narrowband filter so photos will appear highly contrasted without the necessity to use a monochrome camera and separate filters.
- 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) and H-alpha (656nm).
- Three transmission bands - ~25nm for OIII and H-beta, ~11nm for H-alpha.
- Ideal for urban areas with high 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 anodized and laser engraved.
- Plastic PP Case, high pressure EVA Case Lining.
$299
2 year Manufacturer's warranty
In Stock
