Astromania Telescope Filter 1.25 Inch Upgrated O-III Comet Filter Narrowband For Telescope, 99% High Transmission - Light Pollution Reduction For Astrophotography, Fit 1.25 Inch Telescope Accessory

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 Askar Color Magic Duo Super-Narrowband H-a/O-III & S-II/O-III (D1 D2) Imaging Filter Set (2... It features dichroic interference and anti-reflective coating; it is suitable for areas with light pollution and dark sky areas to enhance contrast; Blocks the neighboring OIII line ( Light Pollution Filters | Astrophotography | OPT Telescopes Telescope O-iii Filter Astromania Telescope Filter 1.25 Inch Upgrated O-III Comet Filter Narrowband For Telescope, 99% High Transmission - Light Pollution Reduction For Astrophotography, Fit 1.25 Inch Telescope Accessory Astromania Oiii Filter It features dichroic interference and anti-reflective coating; it is suitable for areas with light pollution and dark sky areas to enhance contrast See more product details Report an issue with this product or seller This bundle contains 2 items (may ship separately) 1 of Astromania Telescope Filter 2 Inch Upgrated O-III Comet Filter Narrowband for Telescope, 99% High Transmission - Light Pollution Reduction for Astrophotography, Fit 2 Inch Telescope Accessory $135.90 Fused Silica Matrix: The OIII filter is made of silica matrix and has an aluminum metal casing. 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