SVBONY SV227 Telescope Filter: 2 SII CCD 5nm Narrow Band Filter

The SVBONY SII CCD Narrowband Filter is designed to provide exceptional performance for astronomical imaging. This filter transmits a 5nm bandwidth of light centered at 672nm, while drastically reducing other transmissions, including wavelengths of light responsible for light pollution. The key features of this filter are as follows:

Infrared Blocking: This SII filter blocks infrared wavelengths from 700nm to 1000nm, eliminating the need for a separate IR-Cut filter. This ensures that only the desired wavelengths reach the imaging sensor, optimizing the final image quality.

Improved Contrast: The narrow bandwidth and high transmission rate of this filter result in a major boost to contrast. This allows for better separation between the object being imaged and the background sky, leading to higher-quality, more detailed images.

Substrate Thickness: The 1.80mm substrate thickness has been carefully selected to ensure optimal wavelength and dispersion characteristics. The Full Width at Half Maximum (FWHM) of the filter is approximately 5nm, further enhancing its spectral purity.

Versatile Mounting: The SV227 SII filter features a M48x0.75 thread interface, allowing it to be easily adapted to a wide range of devices, including telescope eyepieces and camera systems.

Specifications: - Brand: SVBONY - Model: SV227 - Size: 2-Inch - Substrate Thickness: 1.80mm - Clear Aperture: 44mm - Wavelength Range: 300-1000nm - CWL: 672nm - FWHM: 7nm - Blocking: ≥OD5 - Peak Transmittance: ≥90% - Surface Quality: 60/40 - Surface Parallelism: 1/4λ - Thread: M48x0.75 - Net Weight: 12.5g / 0.44oz / 0.027lb

The SVBONY SII 2-inch filter is designed to provide a significant improvement in image quality for astronomical applications. By selectively transmitting a narrow bandwidth of light and blocking unwanted wavelengths, this filter enhances the contrast between the object being imaged and the sky background. This makes it an invaluable tool for both planetary and deep-sky astrophotography, allowing users to capture stunning, high-quality images with their telescopes and cameras.

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