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Model: NGS1-48Brand: IDAS
Generally In Stock, Please Confirm Before Ordering
IDAS 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 bandpassExcellent in-band transmissionSteep bandpass edges minimize internal reflectionsNear IR (NIR) is blocked up to 1200nmAvailable in 52mm and 48mm sizes2.5mm thickness (parfocal with other IDAS LPS filters)IDAS-proprietary IGAD/MBT/UFP qualityMade 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.
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Rother Valley Optics
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Rother Valley Optics Ltd is registered in England and Wales 04762707. Registered Office: 21 Station Road, Kiveton Park, Rotherham, S26 6QP. Rother Valley Optics Ltd acts as a credit broker only. Rother Valley Optics Ltd are authorised and regulated by the Financial Conducts Authority. Credit provided subject to age and status..
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