Feature

●H-beta filter is designed for deep sky observation; especially useful for observing the horse head nebula cocoon nebula
●Svbony SV132 light pollution filters allow the H-B 486nm to pass over 90%; the blocking range is from 400nm to 700nm
●The high-quality transmission of the transmission band and the optical density of the offband are guaranteed by the planetary rotation system a homogeneous and precise coating process
●Ion Auxiliary Deposition (IAD) technology improves the density of the film and ensures that the temperature drift of the filter wavelength is minimised
●Each H beta filter is individually inspected and each filter comes with a plastic housing with high pressure EVA housing liner


Description

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The Lumicon 1.25" Hydrogen Beta Filter isolates only the hydrogen beta line of the spectrum (486nm) in a narrow pass-through band of only 25nm wide and offers maximum contrast. Now you can see extremely weak fog objects such as the horses head, cocoon, and the Californian fog. In many cases, the hydrogen beta filter is the only way to display these objects.

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Spectrum

Over 88% transmission of Hß 486 nm

Less than 0.1% transmission of 400nm-700nm

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Professional manufacturing technology

Laser sculpture of fonts - never fade.

Iro Source Assisted Coating: For durability and scratch resistance as well as stability on CWL (central wavelength) no deviation affected by temperature change.

Constantly strict quality testing procedures: Each filter has been tested by spectrophotometer and laser interferometer to test spectrum and wave to ensure the market filter is a qualified product.

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For telescopic accessories

For telescopic accessories

SV160 narrow band filter suitable for all telescopic accessories with M48 x 0.75 thread

For telescope

For telescope

Ideal for medium and large telescopes - perfect for openings from 300 mm.

Package includes:

1 x 2 inch H-Beta 25 nm filter

1 x robust plastic case

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Specification:

Model SV132
Type H-beta
Size: 2 inches
substrate B270
substrate thickness 1.85 mm
Wavelength Range 400-700 nm
CWL 486 nm ± 2 nm
FWHM 25 nm±2 nm
T-tip 90%
Blocking OD3 @ 300-1100nm
Clear bezel 44 mm
Surface quality 60/40
Surface parallelity 1/4
parallelism 30"
net weight 13.2 g / 0.47 oz

Whats in the box?

  • 1 x 2 inch H-Beta 25 nm filter
  • 1 x robust plastic case