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New Optolong L-Extreme F2 Fast Filter 2-inch Filter for HD Photography

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$309.00

$ 99 .00 $99.00

In Stock

About this item

  • Together with one-shot colour astronomical cameras, monochrome astronomical cameras, and DLSR digital SLR cameras, you can fast and quickly obtain clear and detailed images of the deep sky;
  • Ideal for highspeed imaging system users;
  • Recommended for using fast optical system with focal ratio from f2 to f3.3, like Rasa, Hyperstar, etc;
  • Anti-light pollution、better contrast、more details of the celestial bodies:This filter cuts out background light and noise beyond the target celestial bodies to get better details and contrast of the images. L-eXtreme F2 can effectively block light pollution so that the images will not affected by unwanted lights, and sky light of the background. You can quickly get satisfactory pictures in fast optical systems.


The L-eXtreme F2 is a dual-band (500.7 nm and 656.28 nm, FWHM=7 nm) narrowband pass filter that meets the requirements for transmission at continuously varying angles. Astronomically characterised spectral lines (OIII, Ha) as the main transmission wavelengths, the OIII and H-Alpha nebula emission lines pass accurately at f2 - f3.3 Focal Ratio. It's a product that Optolong has developed specifically for fast optical system, or fast focal ratio imaging systems. It has performed well on RASA, HyperStar and other fast ratio telescopes


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