Baader Planetarium

Baader Planetarium 1.25" Oxygen III Nebula Filter

SKU: AA2458395 MFR: FOIII-1
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About this item

The Baader Planetarium Oxygen III 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. Baader's favorite filter for the majority of nebula, especially 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 (Eagle).

The Baader Planetarium Oxygen III Filter perfectly isolates the two doubly ionized oxygen lines (496 and 501 nm); through a very sharp and narrow band pass (8.2 nm wide, the narrowest of any O-III filter). Unlike other O-III filters, Baader Planetarium O-III completely blocks longer and shorter wavelengths (ever wonder why some O-III filters appear RED? instead of the correct 500 nm Teal color). The result is the highest contrast achievable in an O-III filter.

The Baader Planetarium Oxygen III benefits from the precision fine optically 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. To prevent deterioration from cleaning or exposure to moisture, some other filters even resort to sandwiching their delicate coatings between two layers of filter glass, resulting in potential blurred or double images. 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 (i.e., for imaging use, or ahead of a star diagonal or bino-viewer). Combine with UV/IR filter for the ultimate in O-III deep sky imaging.

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