SVBONY SV227 Telescope Filter, 2 inches SII CCD 5nm Narrow Band Filter for Deep Sky Astrophotography

Product Description The SVBONY SII 2-Inch Narrowband Filter is designed to enhance your astronomical observation experience. With a wavelength range of 300-1000nm, this filter transmits a 5nm bandwidth of light centered at 672nm, effectively reducing other transmissions, including those responsible for light pollution.

The SV227 SII filter blocks infrared wavelengths from 700nm to 1000nm, eliminating the need for a separate IR-Cut filter. Its substrate thickness of 1.80mm and Full Width at Half Maximum (FWHM) of about 5 nm contribute to its high-quality performance.

With a peak transmittance of ≥90% and a blocking capacity of ≥OD5, this filter enhances contrast between objects and the sky, allowing for high-quality imaging. Its M48x0.75 thread interface ensures compatibility with most devices, and it can be used with a filter drawer for convenience.

Specifications: - Brand: SVBONY - Model: SV227 - Size: 2-Inch - Substrate Thickness: 1.80mm - Clear Aperture: 44mm - Wavelength Range: 300-1000nm - CWL: 672nm - FWHM: 5nm - Blocking: ≥OD5 - Peak Transmittance: ≥90% - Surface Quality: 60/40 - Surface Parallelism: 1/4λ - Thread: M48x0.75 - Net Weight: 12.5g / 0.44oz / 0.027lb

Whether you are a planetary photographer or a deep sky visual observer, the SV227 SII filter is a valuable addition to your equipment. Its ability to enhance contrast and block unwanted wavelengths makes it a versatile and essential tool for any astronomer or astrophotographer. Upgrade your observation and exploration with SVBONY.

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