SVBONY SV227 2" OIII 5nm Narrow-Band Telescope Filter - Light Pollution Reduction Filter for CCD Imaging | Enhances Contrast & Details in Deep Sky Astrophotography | Perfect for Nebulae Observation in Light-Polluted Areas

The SV227 OII filter is designed for nebula observation and reducing the transmission of certain wavelengths of light. Previous page Next page 1 ≥OD5 2 2 inches 3 Peak Transmittance Substrate Thickness The thickness of the substrate can affect parameters such as wavelength and dispersion of the SV227 filter. FWHM The Full Width at Half Maximum (FWHM) is about 5 nm. The SV227 OIII filter enhances the contrast between object and sky, allowing you to take good quality images. Thread M48x0.75 thread interface adapts to most devices Use with telescope Connect the SV227 filter with astronomy camera to get the clear image. Center wavelength The OIII filter is designed for nebula observation allowing 5nm bandwidth of light centered on a wavelength of 500.7nm through. Specifications Brand SVBONY Model SV227 Size 2-Inch Substrate Thickness 1.80mm Clear Aperture 44mm Wavelength Range 300-1000nm CWL 500.7nm 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