Optolong L-Extreme Filter

Optolong L-Extreme Filter

L-eXtreme  two 7nm bandpass filter which can be used with one-shot color cameras like DSLR's (digital SLR), and monochrome CCD cameras, it is also more suited for fast systems. This filter allows amateurs to image a rich emission nebulas, even in bright, light pollution skies. Design of L-eXtreme filter would be better choice for fast systems in competitive price.

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

Unlike L-eNhance filter which is tri-band (transmits Hb, Ha, and OIII), L-eXtreme filter is dual band that passes Ha and OIII emission lines. Advantage of L-eXtreme filter is that there is no transmission between H-beta and OIII lines, as there is no nebula emission lines there. This block almost all light pollution come through, maximize nebulas signal and make the sky background darker while imaging. L-eXtreme filter should better isolate the emission lines


Spectrum and Characteristic
-Substrate: B270
-Thickness: 1.85mm
-Tpeak:  T>90%
-Blocking range: 300-1000nm
-Blcoking depth: light pollution  line blocking >99%
-Surface quality: 60/40
-Transmitted Wavefront RMS: λ/4

Contact 011-11230602 For More Information. Available In Stock, 100% Original Local Unit With Full Warranty And Aftersales Service

Official Optolong Astro Filter Dealer