Optolong L-Extreme 7nm Dual Narrowband Astrophotography Filter 2"

The Optolong L-eXtreme is a 7nm dual-bandpass filter designed for use with one-shot color cameras such as DSLRs and CCD/CMOS astrophotography cameras, especially suited for fast optical systems. This filter allows amateurs to image emission nebulae even in bright, light-polluted or moonlit skies by isolating the H-Alpha and Oxygen III nebula emission lines, maximizing contrast and signal-to-noise ratio. The L-eXtreme is an excellent choice for imaging in very light-polluted areas or when the moon is out. The advantage of this filter is that there is no light transmission between the H-beta and OIII lines, which maximizes the nebula's signal and darkens the sky background. Unlike the L-eNhance filter, which is a tri-band, the L-eXtreme filter is dual-band, passing just the Ha and OIII emission lines for improved light pollution rejection. Note: For imaging galaxies and reflection nebulae, the Optolong L-Pro filter is more appropriate as this filter will reject much of the light from those objects.

Features:
* Dual H-Alpha/O-III 7nm narrowband filter
* Allows for imaging in bright man-made light pollution and moonlit conditions
* Most useful for One-Shot Color cameras
* Take color images without needing to combine images with multiple filters
* Use for taking images of emission nebulae