OIII Ultra-Narrowband 4.5nm 50x50mm Filter for CCD - Unmounted

The OIII Ultra-Narrowband 4.5nm 50x50mm filter is an essential tool for astrophotographers looking to capture the subtle details of planetary nebulae and emission nebulae. Designed to only allow light at 501-502 nm (doubly ionized oxygen O-III line), it effectively blocks other wavelengths to significantly increase contrast and reveal structures that are difficult to perceive with the naked eye or with broader filters.This filter is particularly suitable for use with monochrome CCD cameras and can be combined with H-alpha and SII filters to create extremely detailed false-color images. It is supplied without a mount, making it ideal for 50x50 mm compatible filter wheel systems.FeaturesAdvantagesCompatibilityIncluded ItemsType: narrowband filterCentral wavelength: 502 nmBandwidth: 4.5 nmSize: 50 x 50 mmThickness: 3 mmOptical coating: dielectric multilayerMount: unmountedDesigned for CCD imagingEnhances details of planetary and emission nebulaeGreatly improves contrast by blocking light pollution and other spectral linesAllows capture of faint structures thanks to its narrow bandwidthOptimized for combination with H-alpha and SII filtersCompatible with monochrome CCD camerasFits in 50x50 mm filter wheelsUnmounted OIII 50x50mm filterDust-proof protective box