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ZWO SII 7nm 1.25-inch Filter
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The ZWO SII 7nm 1.25-inch filter is designed for enhancing contrast in nebula observation by selectively transmitting light at a wavelength of 672nm with a bandpass of 7nm. This narrowband filter does not brighten nebulae but improves the contrast between the target object and the night sky, effectively reducing the impact of light pollution and skyglow.
The filter is particularly useful for observing emission nebulae, planetary nebulae, and supernova remnants. When used in combination with H-alpha and OIII filters (SHO Set), it supports tricolor CCD astrophotography, offering a comprehensive solution for capturing detailed images of deep-sky objects.
Technical Parameters:
- Size: 1.25 inches
- Thickness: 5.5mm + 2.5mm (thread)
- Glass Thickness: 1.85mm
- Thread: M28.5 x 0.6 male thread
About ZWO Optical
Established in 2011, ZWO Optical is a fast-growing global astroimaging camera powerhouse based in Suzhou, China. Known for its iconic ZWO ASI 120MM Monochrome CMOS Camera, the first-ever planetary CMOS camera to beat a CCD in the early 2010s, ZWO has pioneered new astroimaging technology with revolutionary new features, including USB 3,0, cooled systems, ADC and more. Today, ZWO Cameras is known by every passionate astrophotographer and is available in over 25 countries world-wide.
Product Code: SII7nm1.25