Description

SVBONY SV132 1.25 H-Beta 25nm Light Pollution Filter

• SV132 H-Beta eyepiece filter makes it possible to view the elusive Horsehead, California, and Cocoon Nebulas in dark skies;Great used with a moderate to large aperture telescope and clear dark skies
• Optical high precision double side polishing; Filter substrate is fine-optically polished to 1 4 wave and <30 parallelism over both surfaces; Avoid halos
• Precision double-sided optical coatings improve transmission and cut-off depth; Executes with a transmission of over 90% and completely rejects light pollution
• High value transmission of pass-band and optical density of off-band is assured through planetary rotation system, a homogenous and precise coating procedure; The high optical quality of SV132 filters guarantees no loss in sharpness or contrast
• Filter with metal mount 1.25 filter threads; Threaded to fit 1.25 eyepieces and threaded diagonal barrels

• 1. Each Svbony filter has an ultra hard, vacuum-deposited coating carefully designed to observe the Orion Horsehead Nebula and the California Nebula, which are difficult to capture. This eliminates the un-natural colored halos surrounding bright stars common with H-Beta filters of less sophisticated coating technology

  2. The 1.25 Svbony H-Beta filters suitable for viewing bright nebulae, and matching with large-aperture telescopes to observe linear spectrum nebulae,such as the M42 Orion Nebula under severe light pollution, emission nebulae, planetary stars & supernova remnants

  3. Suitable for viewing on the faint and elusive Horsehead Nebula and California Nebula

  Technical Specifications 

  Model		W9102A
  Size		1.25
  Thread Size		M28.5*0.6
  Blocking area		400-700nm
  Transmittance		80% at 486nm
  Transmission Hg		0.1% at 435nm and 578nm
  Transmission Na		0.1% at 589nm
  FWHM		25±3nm
  Thickness		1.85mm

  In the Box 

  1.25 H-Beta 25nm Light Pollution Filter

  Manuals & Warranty

  Svbony 1-Year Warranty 

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