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SPECIALTY FILTERS

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Lumicon Night Sky H-Alpha Filters

Lumicon Hight Sky Hydrogen Alpha Filters (H-Alpha)

Lumicon's Night Sky Hydrogen-Alpha Filters are long-pass filters with a 50% transition from blocking to passing at about 640nm. At wavelengths longer than 600nm, transmittance is 90% or above. The filter is used as an extreme anti light-pollution filter, and for contrast-enhancement of emission nebulae and other astronomical objects bright in the infrared.

  • 1.25" Night Sky Hydrogen-Alpha Filter, threads into the nose-piece of industry-standard 1.25" Digital Imagers.
  • 2" Night Sky Hydrogen-Alpha Filter, threads into 2" Camera Adapters, such as the Lumicon LC1025, 2" Prime Focus Camera Adapter, or the LA1080, Low Profile 2" Prime Focus Camera Adapter.
  • 58mm Threaded for 58mm camera lenses.
  • 72mm Threaded for 58mm camera lenses.
  • 77mm Threaded for 58mm camera lenses.
  • 82mm Threaded for 58mm camera lenses.
1.25"  $79.95

2"
$99.95

58mm
$109.95

72mm
$119.95

77mm
$129.95

82mm
$139.95

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Lumicon Infrared Filters
Lumicon Infrared Filters

Lumicon Minus Violet and Infrared Blocking Filters are used primarily to "bracket" the color-corrected band of refracting telescopes.  The Minus Violet and Infrared Blocking Filters can also be used as "visible" filters in RGBV (red-green-blue-visible) astrophotography with reflecting telescopes. The larger Minus Violet filters are for telephoto lenses.

Most digital/CCD cameras have built-in infrared filters, in which case either the Minus Violet or Infrared filter may be used. The choice would depend on how far into the blue your primary lens is color-corrected. The Minus Violet filter blocks wavelengths shorter than about 420nm; the Infrared filter blocks wavelengths shorter than about 400nm. If your camera does not have a built-in infrared filter, the Infrared Blocking Filter is recommended, which blocks all wavelengths longer than 750nm.

1.25"
$69.95

2"
99.95
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Lumicon Minus Violet Filters
Lumicon Minus Violet Filters

Lumicon Minus Violet and Infrared Blocking Filters are used primarily to "bracket" the color-corrected band of refracting telescopes.  The Minus Violet and Infrared Blocking Filters can also be used as "visible" filters in RGBV (red-green-blue-visible) astrophotography with reflecting telescopes. The larger Minus Violet filters are for telephoto lenses.

Most digital/CCD cameras have built-in infrared filters, in which case either the Minus Violet or Infrared filter may be used. The choice would depend on how far into the blue your primary lens is color-corrected. The Minus Violet filter blocks wavelengths shorter than about 420nm; the Infrared filter blocks wavelengths shorter than about 400nm. If your camera does not have a built-in infrared filter, the Infrared Blocking Filter is recommended, which blocks all wavelengths longer than 750nm.
1.25
$59.95

2"
$79.95

58mm
$89.95

72mm
$99.95

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