Bandmate Type 2 OIII Filter - 1.25"

This 1.25" Oxygen-III filter has been optimized for planetary nebulae observation, passing light from doubly ionized oxygen atoms to produce significant contrast gain even in ideal observation settings. The filter is produced for Tele Vue in Germany by Astronomik, featuring optical testing by Tele Vue in high power-space to ensure no image degradation, testing by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanical testing for fit, and cosmetic inspection for pinholes, digs, and sleeks. All filters are backed with a 10-year warranty against manufacturing defects.