Tele Vue’s line of premium quality Bandmate filters; guaranteed to perform and fit, with uniformity beyond any competitive brand.
The distinction you’ll find find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes. All the materials are sourced in Germany. Each filter is: optically tested by Tele Vue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks.
The OIII and Hß filters are more typical representative offerings available from Astronomik’s product line but with the tight specification tolerances and additional assurance of Tele Vue’s testing guarantee.
OIII Filter: The ZWO narrowband O-III 7nm filter is designed for nebula observation allowing 7nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, blocking out all other light.