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Baader O-III Nebula Filter - 1.25" # FOIII-1 2458395

Product Details

  • Product Dimensions: 3 x 3 x 1 inches
  • Item Weight: 2.08 ounces
  • Shipping Weight: 2.08 ounces
  • Item model number: 2458395

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. Our favorite filter for the majority of nebula,
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
(Eagle). The Baader Planetarium Oxygen III Filter perfectly isolates the two
doubly ionized oxygen lines (496 and 501nm), through a very sharp and narrow
bandpass ( 10 nm). Unlike other O-III filters, the 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 fineoptically 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
(ie, for imaging use, or ahead of a star diagonal or binoviewer). Combine with
our UV/IR filter for the ultimate in O-III deep sky imaging.

Filed under: Eyepieces & Accessories