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      • × Chroma SII 3nm Narrowband Filter For Fast Telescopes – 50mm Square Online Hot SaleChroma SII 3nm Narrowband Filter For Fast Telescopes – 50mm Square Online Hot Sale 1 × $91.00

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    • × Chroma SII 3nm Narrowband Filter For Fast Telescopes – 50mm Square Online Hot SaleChroma SII 3nm Narrowband Filter For Fast Telescopes – 50mm Square Online Hot Sale 1 × $91.00

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Chroma H-beta 3nm Bandpass Filter – 50mm Square Sale

$1,554.99 Original price was: $1,554.99.$98.00Current price is: $98.00.

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Chroma H-beta 3nm Bandpass Filter – 50mm Square

This Chroma H-beta 3nm Bandpass Filter – 50mm Square:

is useful for imaging nebulae and objects which are rich in ionized hydrogen. At the 486.1nm emission line, a narrow-band filter is required to separate H-beta from the nearby blue and green spectral lines. Though it is weaker than the H-alpha line, this is often used for visual detection as the longer red wavelength of H-alpha are difficult to detect by eye.

Type AS filter.

Optical Density Values:

All transmission and blocking (OD) data are actual, measured spectra of representative production lots. Spectra varies slightly from lot to lot. Optical density values in excess of 6 may appear noisy because such evaluations push the resolution limit of low light level measurements.

 

  • H-beta 3nm Bandpass Filter.
  • 50mm Square, unmounted.
  • Useful for imaging nebulae and objects which are rich in ionized hydrogen.
  • At the 486.1nm emission line.
  • Required to separate H-beta from the nearby blue and green spectral lines.
  • Weaker than the H-alpha line, this is often used for visual detection as the longer red wavelength of H-alpha are difficult to detect by eye.
  • Type AS filter.

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