IDAS Night Glow Suppression Filters

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Your Price: $254.99

Part Number: NGS1

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Description

DAS Night Glow Filters enhance the contrast of astronomical emission nebulae against a sky with both man-made and natural* sky glow sources, yet preserve color balance of broadband objects such as galaxies. As with other IDAS interference filters, the bandpasses are designed to accommodate the steep ray angles of fast optical systems.

Ideal flat-top and moderate bandpass
Excellent in-band transmission
Steep bandpass edges minimize internal reflections
Near IR (NIR) is blocked up to 1200nm
Available in 52mm and 48mm sizes
2.5mm thickness (parfocal with other IDAS LPS filters)
IDAS-proprietary IGAD/MBT/UFP quality
Made in Japan

* Natural sky glow sources blocked include upper atmosphere oxygen and sodium lines which become visible from high-altitude, dark sky sites. See videos at the bottom of this page for background information on natural sky glow.

Additional Information on Natural Sky Glow

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IDAS Night Glow Suppression Filters

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Additional Information on Natural Sky Glow

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