filters – Astronomy Now

20 April 2025

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Antlia ALP-T 5nm dual-band filter

27 October 2023 Astronomy Now

Nik Szymanek tests a new dual-passband filter from Antlia that allows imagers to simultaneously capture narrowband data in hydrogen-alpha and oxygen-III light.

Beating the LED streetlights: IDAS light-pollution suppression LPS-D2 filter

18 March 2022 Ade Ashford

The LPS-D2 filter is the world’s first filter designed specifically to combat LED light pollution. Ade Ashford took a close look at the data to see how effective it will be.