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Baader Visual OIII Nebula Filter - 2" - FOIII-2


Baader 2" Oxygen III Nebula Filter

The Baader Planetarium Oxygen III Nebula Filter delivers the absolute highest contrast views of many diffuse and planetary nebula. For many objects, the Baader Planetarium O-III reveals a level of intricate detail that rivals the best deep sky photographs. Our favorite filter for the majority of nebulae, especially The Veil, Lagoon (M8), Swan (M17), Ring (M57) and Dumbell (M29). With a large scope, you can even view the famous "Pillars of Creation" in M16 (the Eagle).

The Oxygen III Nebula Filter by Baader perfectly isolates the two doubly ionized oxygen lines (496 and 501 nm), through a very sharp and narrow bandpass (8.2 nm, the narrowest of any O-III filter). Unlike other O-III filters, the Baader Planetarium O-III completely blocks longer and shorter wavelengths, which means your images will appear in the correct 500 nm Teal color). This yields the highest contrast achievable with an O-III filter.

The Baader Planetarium Oxygen III Nebula Filter benefits from its precision fine-polished flat substrate, and advanced DWDM plasma assisted coatings. As a result, the Baader O-III will not degrade image sharpness or impart double images. These filters will not deteriorate due to normal cleaning or exposure to moisture. Contrary to myth, nebula filters are often useful at high magnifications, where image quality counts. Baader O-III filters can take high magnifications, and stars retain their pinpoint sharpness, even if the filter is used far ahead of the image plane (for imaging use, or ahead of a star diagonal or binoviewer). Combine with an optional Baader UV/IR filter for the ultimate in O-III deep sky imaging.