IDAS LPS-D3 (formerly NGS1) Light Pollution Suppression Filters

• 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.