Optolong L-eXtreme F2 Filter (2")

The Optolong L-eXtreme is a 7nm dual-bandpass filter that can be used with one-shot color cameras, such as DSLRs (digital single-lens reflex cameras) and monochrome CCD cameras. It is also suitable for "fast" optical systems.

The nature of this filter makes it possible to photograph emission nebulae even in skies with heavy light pollution. Optolong believes the design of the L-eXtreme filter is a better choice for fast systems at a competitive price. The Optolong L-eXtreme filter isolates the H-Alpha and OIII emission lines of nebulae, maximizing the contrast and signal-to-noise ratio between nebulae. For people living in heavily light-polluted areas or who want to take photos when the moon is out, the L-eXtreme is an excellent filter.

Unlike the L-eNhance filter, which is a tri-band filter (transmitting Hb, Ha, and OIII), the L-eXtreme filter is a dual-band filter that allows the passage of the H-Alpha and OIII emission lines.

Main features

Optolong quality for a reliable and fulfilling observation experience.

• Type: Filter
• Optical coating: multiple
• Frame: 2"
• Frame material: Aluminum
• Transmission: 99
• Surface accuracy: 4

Main technical specifications