Description

Baader O-III (10nm) Visual Nebula Filter

Delivers the absolute highest contrast views of many diffuse and planetary nebula. For many objects, the Baader 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 O-III perfectly isolates the two doubly ionized oxygen lines (496 and 501nm), through a very sharp and optimally narrow bandpass (10 nm wide). Unlike other O-III filters, the Baader 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 O-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.  Typical Transmission Curves

Technical Specifications

1.25

MANUFACTURER		Baader Planetarium
SKU (#)		2458395
EAN CODE		4047825009364
WEIGHT (KG)		0.059
TRANSMISSION RANGE		O-III
FILTER THICKNESS (WITHOUT CELL)		2 mm
HBW (HALFBANDWIDTH)		10nm
CWL (CENTRAL WAVELENGTH)		502 nm
AR-COATING		dielectrically coated, planeoptically polished
FILTER SIZE		1 25 inch
FILTER USAGE		Contrast Enhancement, O-III, Planetary
FILTER MOUNTED		Mounted (LPFC 6mm)
TYPE OF FILTER		Narrowband
SINGLE OR SET?		Single Filter
FILTER SHAPE		round

2

MANUFACTURER		Baader Planetarium
SKU (#)		2458396
EAN CODE		4047825009357
WEIGHT (KG)		0.065
COLOUR		Black
TRANSMISSION RANGE		O-III
FILTER THICKNESS (WITHOUT CELL)		2 mm
HBW (HALFBANDWIDTH)		10nm
CWL (CENTRAL WAVELENGTH)		502 nm
AR-COATING		dielectrically coated, planeoptically polished
FILTER SIZE		2 inch
FILTER USAGE		Contrast Enhancement, O-III, Planetary
FILTER MOUNTED		Mounted (LPFC 6mm)
TYPE OF FILTER		Narrowband
SINGLE OR SET?		Single Filter
FILTER SHAPE		round

In the Box

• Baader Planetarium 1.25 2 Oxygen III Nebula Filter
  

• Warranty & Manuals

  2-Year Warranty

Size	1.25", 2"