{"id":28985,"date":"2025-09-20T19:51:10","date_gmt":"2025-09-20T17:51:10","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=28985"},"modified":"2026-08-25T15:10:45","modified_gmt":"2026-08-25T13:10:45","slug":"optolong-l-extreme-filter-2-inch","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/optolong-l-extreme-filter-2-inch\/","title":{"rendered":"Optolong L-eXtreme Filter 2 inch"},"content":{"rendered":"

Optolong L-eXtreme Filter 2 inch: 7 nm dual-band for color cameras<\/strong><\/h2>\n\n\n\n

The L-eXtreme is the sharpened successor to the L-eNhance: two passbands of 7 nm each, precisely on the H-alpha line (656.3 nm) and the OIII line (500.7 nm). Everything outside of that, from streetlights to moonlight, is blocked.<\/p>\n\n\n\n

This allows you to capture the signal with a color camera in a single series of shots that previously required a monochrome camera with a filter wheel. Emission nebulae show rich structure against a virtually black background. The 2-inch version (M48) prevents vignetting on large sensors and fits into 2-inch filter holders and photographic adapters.<\/p>\n\n\n\n

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When L-eXtreme instead of L-eNhance<\/h4>\n\n\n\n

The smaller the aperture, the darker the background and the higher the contrast, especially under heavy light pollution or moonlight. With 7 nm per band, the L-eXtreme is a clear step beyond the L-eNhance in this regard.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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Technology<\/h4>\n\n\n\n

Multi-layer ion-assisted coatings provide high transmission at both lines, temperature stability, and scratch resistance. The thin bezel minimizes vignetting.<\/p>\n<\/div>\n<\/div>\n\n\n\n

Featured accessories<\/h3>\n\n\n\n

A clear focus filter makes focusing with this narrow filter much easier; we're happy to provide that.<\/p>\n\n\n\n

For whom yes and for whom no<\/h3>\n\n\n\n