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1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation

1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation

$ 38.53

Availability: 100 in stock
  • Type: filter
  • Condition: New
  • FWHM: 25±3nm
  • Filter Type: Thin metal cells have a clear aperture of 26mm for
  • Country/Region of Manufacture: China
  • Transmittance: 80% at 486nm
  • Weight: 5.4g /0.19oz
  • Return shipping will be paid by: Buyer
  • Brand: SVBONY
  • MPN: Does Not Apply
  • Size: 1.25 in
  • Thickness: 1.85mm
  • Surface quality: 60/40 (Refer to MIL-O-13830)
  • Item must be returned within: 30 Days
  • Features: 0.1% transmission Na at 589nm
  • Model: SV132
  • Blocking area: 400-700nm
  • Restocking Fee: No
  • Refund will be given as: Money back or replacement (buyer's choice)
  • Thread Size: M28.5*0.6
  • All returns accepted: Returns Accepted
  • Features:: 0.1% transmission Hg at 435nm and 578nm

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    1.25'' Telescope Filter H-Beta 25nm for Horsehead Nebula in Dark Sky observation
    Product Description
    The H-Beta 25nm Filter allows you to visually observe the ever-popular yet elusive Horsehead Nebula with large aperture telescopes under dark skies, and can also be used to image the Horsehead as well as others that emit light at 486nm, such as the California and Cocoon nebulae.
    Features:
    CNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture
    Laser-engraved to prevent fading
    Multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition
    Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces
    High value transmission of pass-band and optical density of off-band is assured through Optolong's planetary rotation system, a homogenous and precise coating procedure
    Each filter comes with a plastic case with high pressure EVA case lining
    Best used with a moderate to large aperture telescope and clear, dark skies
    WARNING: The filters are not designed for sun observation. DO NOT LOOK AT THE SUN WITH this FILTER. You would be BLIND if you fail to observe the warning.
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    Svbony focus on telescope and optical accessories. Aim to supply the high quality products and best service to customers. Main items are including Telescope, Monocular, Binocular, Spotting scope, filter, eyepiece and other accessories. We hope that you could enjoy a much more clorful life by using our products.
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    On Mar-15-21 at 01:51:07 PDT, seller added the following information: