In Stock
RM950.00 Ex Tax: RM950.00
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  • Product Code: LP2IN

OPTOLONG L-Pro 2in Filter 

Optolong L-Pro (L-Professional) is a multi-bandpass filter which selectively suppresses the transmission of light pollution lines. For example, mercury vapor lamps, high and low pressure sodium vapor lights and skyglow caused by emission from neutral oxygen in our atmosphere.


L-Pro enhances the transmission of major emissions from nebula while offering great colour balance with its wide yet effective light pollution cutting transmission band. The balanced transmission allows objects with wide emission spectrum such as galaxies to be imaged with minimal colour cast (easier to correct in post-processing). Among the emission lines enhanced are OIII (496, 500nm), H-beta (486nm), NII (654, 658nm), H-alpha (656nm) and SII (672nm).  


Spectrum and Highlights

  • 90% transmission at major nebula emission lines
  • Multi-layers anti-reflection coating
  • Precise and sharp roll-off at light pollutant lines
  • Made on Schott substrate
  • Finely polished to 1/4 wave accuracy
  • Surface quality: 60/40 (MIL-O-13830 standard)
Main Feature:
  • Metal frame, superior aviation aluminum
  • Sophisticated CNC molding in one
  • Laser engraving characteristic is never-faded
  • M48*0.75 Thread
  • Multi-bandpass light pollution filter for astrophotography
  • Precise and sharp roll-off at light pollutant emission lines
  • Very high transmission (~90%) at major nebula emission lines
  • Multi-layers anti-reflection coating

Recommended applications

  • Monochrome & one-shot-colour CCD/CMOS camera
  • Deep sky colour imaging, particularly reflective nebula and galaxies



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