Baader Planetarium Visual Oxygen-III Filter 2"
|The Baader O-III delivers outstanding views of many emission and planetary nebula. This filter provides maximum contrast and image sharpness due to it's narrow, high efficiency bandpass and high quality single substrate. Oxygen III filters are normally used to observe supernovae remnants, which are rich in ionized Oxygen. Objests such as the Veil nebula will see a remarkable increase in contrast and detail when using this filter.|