About This

• New Upgrade: Astromania Upgrade Edition OIII Filter is used for capturing the gas tails and gas flows of comets; with the two brightest C2 emission lines at wavelengths of 511 and 514 nm; the full width at half maximum wavelength is less than 15 nm
• High transmittance: Within the wavelength range of 504 nanometers to 525 nanometers; only the double-ionized oxygen line with wavelengths between 510 nanometers and 518 nanometers passes through with 99% of the wavelengths
• Fused Silica Matrix: The OIII filter is made of silica matrix and has an aluminum metal casing. It features dichroic interference and anti-reflective coating; it is suitable for areas with light pollution and dark sky areas to enhance contrast
• Advanced Narrowband Filter: Blocks the neighboring OIII line (<1% transmission), which does not appear mainly in comet tails; narrowband filter can only increase the contrast between the nebula and the night sky but not brighten it
• Standard 2 Inch Thread: Suitable for large aperture telescopes with 2 inch focuser; compatible with 2 inch eyepieces; barlow lens; diagonal prism and other telescope accessories

Overview

• Brand : Astromania
• Material : Silica, Aluminum
• Photo Filter Thread Size : 50.8 Millimeters
• Coating Description : Multi Coating
• Photo Filter Effect Type : Color Correcting
• Water Resistance Level : Waterproof
• Photo Filter Size : 50.8 Millimeters