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SV132 H-Beta Filter 25nm 1.25inch Light Pollution Filter

SKU: W9102A
-10% US$ 49.49
List Price: US$ 54.99
  • 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
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Svbony 1.25'' H-Beta filter 25nm.jpg

Svbony 1.25'' H-Beta filter 25nm.jpg

Svbony 1.25'' H-Beta filter 25nm.jpg

Svbony 1.25'' H-Beta filter 25nm.jpg

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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

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

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