Optolong 2" L-eXtreme Dual-Narrowband Filter

L-eXtreme is a dual 7nm bandpass filter which can be used with one-shot color cameras like DSLR's and monochrome CCD cameras, it is also more suited for fast systems. The convenience and cost effectiveness of this filter allows amateurs to image a rich emission nebulas, even in bright, light polluted skies. 

The filter isolates the H-Alpha, and Oxygen III nebula emission lines so that the contrast and signal-to-noise ratio between nebulae were maximized. For people who are imaging in very light polluted areas, or when the moon is out, the L-eXtreme will be a good filter.

The advantage of the L-eXtreme filter is that there is no transmission between the H-beta and OIII lines, as there are no nebula emission lines there.