Astrodon Near IR Luminance Filter - 50mm Round Unmounted

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Astrodon Near IR Luminance Filter - 50mm Round Unmounted

Astrodon Near IR-Luminance Filter - 50mm

There are two types of luminance filters: NIR-blocked (L) and unblocked (C = Clear). The "L" type is designed to match the spectral range of RGB filters. Some astronomers prefer this for color images because of the spectral matching. Others want all the photons possible. The "C" type adds about 40% more signal from the NIR (using a Kodak KAF3200ME detector, for example) to produce a deeper luminance image. Most object colors and emission lines lie within the Visible part of the spectrum.


The NIR region remains largely unexplored by amateur imagers. NIR imaging could become another tool in the imager's toolkit. Use the NIR luminance (no visible light) to explore galaxy structure, in comparison to VIS luminance data.


Some of the goals of Astrodon Near-Infrared Filters are to produce tri-color images entirely in the NIR. Color combine weights for NIR1, 2, 3 are ~ 1:1:1.2. Now you can examine objects highly obscured by dust in the plane of the Milky Way. The Astrodon NIR filters permit you to explore faint, extended red emission nebula. Reveal stars and other details in nebula that are obscured by bright VIS emissions from H-a, SII, OIII or other elements! You can mix NIR with RGB of globular clusters to enhance the appearance of cooler stars and minimize terrestrial light pollution for imagers living in suburban or city locations.


Astrodon Near-Infrared Tricolor Filters Feature:

  • 1.25" mounted, 50 mm diameter
  • 3+/-0.05 mm thickness
  • Parfocal with other Astrodon LRGB and Narrowband filters
  • NIR1,2,3 (700-800 nm, 800-900 nm, >850 nm)
  • NIR Luminance can be sold separately
  • Weighting factors ~1:1:1 for KAF3200ME and similar detectors
Astrodon Product Number: NIRL-50R

Product image depicts Astrodon Venus filter for illustratory purposes.


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