Chroma Technology 3nm/5nm H-beta Filters (27004/27005)
Chroma Technology 3nm/5nm H-beta Filters (27004/27005)
Other Options
$780 3nm (CT-27004) / 50x50mm Unmounted (-50X50)
$2,095 3nm (CT-27004) / 2" Mounted (-2M)
$2,060 5nm (CT-27005) / 2" Mounted (-2M)
$1,890 5nm (CT-27005) / 50x50mm Unmounted (-50X50)
$1,865 3nm (CT-27004) / 50mm Unmounted (-50D)
$1,690 5nm (CT-27005) / 50mm Unmounted (-50D)
$1,250 3nm (CT-27004) / 36mm Unmounted (-36D)
$1,050 3nm (CT-27004) / 31mm Unmounted (-31D)
$845 5nm (CT-27005) / 36mm Unmounted (-36D)
$840 5nm (CT-27005) / 31mm Unmounted (-31D)
$630 5nm (CT-27005) / 1.25" Mounted (-1.25M)
$625
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Product Description
H-beta filters are also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrow-band filter is required to separate H-beta from nearby blue and green spectral lines. Although weaker than the H-alpha line, this is often used for visual detection as the longer red wavelengths of H-alpha are difficult to detect by eye.
Specifications
3nm Transmission Curve
5nm Transmission Curve
Note: 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.
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