Optolong L-eXtreme Filter - 1.25-inch

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Optolong
OPT-14801
SKU
OPT-14801

The L-eXtreme Filter by Optolong is a dual band filter that acts against light pollution. It isolates H-Alpha (Red) and O-III (green/blue) nebulae emission lines to improve contrast and maximise nebulae signal.

 

- Maximised transmission of the Ha (656nm) and OIII (496nm / 500nm) main nebula emission lines

- Designed for astrophotography through colour cameras and DSLR's in urban areas or areas with heavy light pollution

- Blocks light pollution from natural skyglow (atmospheric neutral oxygen emission), as well as artificial pollution from mercury vapour lamps and low and high pressure sodium vapour

OUR PRICE $399.00

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    Outsmart light pollution with the Optolong L-eXtreme Filter.

    The L-eXtreme Filter by Optolong is a dual band filter that acts against light pollution. It isolates H-Alpha (Red) and O-III (green/blue) nebulae emission lines to improve contrast and maximise nebulae signal.

    It works well as a light pollution filter to make the sky darker in urban areas, or even when the moon is out, as there is no transmission between the Ha and OIII lines.

     

    Features

    - Maximised transmission of the Ha (656nm) and OIII (496nm / 500nm) main nebula emission lines

    - Blocks light pollution from natural skyglow (atmospheric neutral oxygen emission), as well as artificial pollution from mercury vapour lamps and low and high pressure sodium vapour

    - Designed for astrophotography through colour cameras and DSLR's in urban areas or areas with heavy light pollution

    - Anti-reflective, multi-layered coating

    - Integrated IR/UV-Cut Filter

    - 7nm bandpass

    - High-quality cell made of a CNC machined aerometal

    - Includes a polypropylene case lined with a high pressure EVA Case Lining

     

    Please note that the L-Extreme Filter only works with telescopes slower than F4. It will not be compatible with telescopes faster than F4 such as RASAs or Hyperstars.    

     

    Wavelength Spectrum

    Optolong L-Extreme Wavelength Spectrum

     

    Warning: Optolong L-Extreme Filters are not suitable for solar viewing. Do not use it to view the Sun. 

     

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    About Optolong Optics

    Optolong Optics produces a range of specialist narrowband and broadband filters for astronomers of all levels - from amateur astronomers to professional astrophotographers. Whether you are looking for a CLS light filter to reduce skyglow in your backyard or their specialty bandpass filters for deep sky imaging, you’re at the right place.

    Product Code: OPT-14801

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