Optolong L-eNhance Filter - 2"

In Stock
Regular price $260.00 CAD
Regular price $309.00 CAD Sale Sale price $260.00 CAD

Product details


The Optolong 2" L-eNhance is a dual-band pass filter that effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines to achieve a maximum transmission of up to 90%. The performance of this filter delivers results that control the impact from light polluted skies in a major way.

 Technical Data

  • Substrate:  B270
  • Thickness:  1.85 mm
  • Surface Quality: 60/40 (Refer to MIL-O-13830)
  • Fine-optically polished to ensure accurate 1/4 wavefront and < 30 seconds parallelism over the both surfaces
  • Tpeak:  T>90%
  • Blocking Range:  300 nm - 1000 nm
  • Blocking Depth:  Light pollution line blocking >99%
  • Parallelism: 30s
  • Multi-layers of anti-reflection coating