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Baader Ultra Narrowband O-III CCD-Filter (4,5nm)

$274.00
SKU FOIIINU-1 (Baader #2458434T)
Filter size

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Description
  • Premium grade O-III CCD-filter for fast optical systems f/8 to f/3
  • IR-blocked
  • NO halos, NO reflections, NO ghosting
  • non-aging sealed coating edges

Baader's New Ultra Narrowband Enforced Filters

These three sizes of Ultra-Narrowband filters open up the extremely narrow H-alpha, O-III, and S-II world. This enforced contrast provides more signal of the faintest nebula detail. Manufacturing such ultra-narrow filters requires extreme coating homogeneity and very high Center Wavelength Precision, which these filters have been designed for. Designed for use on optical systems from f/10 to f/3.5.

Now available in all popular sizes; 1.25"Mounted, 2" Mounted, 31mm Round, 36mm Round, 50.4mm Round, 50x50 Square, and 65x65mm Square.

Why Baader Planetarium Filters?

Specifications

1.25"

MANUFACTURER Baader Planetarium
SKU (#) 2458434T
WEIGHT (KG) 0.059
COLOUR Black
TRANSMISSION RANGE O-III
FILTER THICKNESS (WITHOUT CELL) 2 mm
HBW (HALFBANDWIDTH) 4,5nm
CWL (CENTRAL WAVELENGTH) 502 nm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 1 25 inch
FILTER USAGE CCD, IR-Cut, O-III
FILTER MOUNTED Mounted (LPFC 6mm)
TYPE OF FILTER Narrowband
SINGLE OR SET? Single Filter
FILTER SHAPE round

2"

MANUFACTURER Baader Planetarium
SKU (#) 2458434W
WEIGHT (KG) 0.065
COLOUR Black
TRANSMISSION RANGE O-III
FILTER THICKNESS (WITHOUT CELL) 2 mm
HBW (HALFBANDWIDTH) 4,5nm
CWL (CENTRAL WAVELENGTH) 502 nm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 2 inch
FILTER USAGE CCD, IR-Cut, O-III
FILTER MOUNTED Mounted (LPFC 6mm)
TYPE OF FILTER Narrowband
SINGLE OR SET? Single Filter
FILTER SHAPE round

31mm

MANUFACTURER Baader Planetarium
SKU (#) 2458434U
WEIGHT (KG) 0.065
COLOUR Black
TRANSMISSION RANGE O-III
FILTER THICKNESS (WITHOUT CELL) 2 mm
HBW (HALFBANDWIDTH) 4,5nm
CWL (CENTRAL WAVELENGTH) 502 nm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 31 mm
FILTER USAGE CCD, IR-Cut, O-III
FILTER MOUNTED Unmounted
TYPE OF FILTER Narrowband
SINGLE OR SET? Single Filter
FILTER SHAPE round

36mm

MANUFACTURER Baader Planetarium
SKU (#) 2458434V
WEIGHT (KG) 0.065
COLOUR Black
TRANSMISSION RANGE O-III
FILTER THICKNESS (WITHOUT CELL) 2 mm
HBW (HALFBANDWIDTH) 4,5nm
CWL (CENTRAL WAVELENGTH) 502 nm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 36 mm
FILTER USAGE CCD, IR-Cut, O-III
FILTER MOUNTED Unmounted
TYPE OF FILTER Narrowband
SINGLE OR SET? Single Filter
FILTER SHAPE round

50.4mm

MANUFACTURER Baader Planetarium
SKU (#) 2458434X
WEIGHT (KG) 0.07
COLOUR Black
TRANSMISSION RANGE O-III
FILTER THICKNESS (WITHOUT CELL) 3 mm
HBW (HALFBANDWIDTH) 4,5nm
CWL (CENTRAL WAVELENGTH) 502 nm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 50.4 mm
FILTER USAGE CCD, IR-Cut, O-III
FILTER MOUNTED Unmounted
TYPE OF FILTER Narrowband
SINGLE OR SET? Single Filter
FILTER SHAPE round

50x50mm

MANUFACTURER Baader Planetarium
SKU (#) 2458434Y
WEIGHT (KG) 0.073
COLOUR Black
TRANSMISSION RANGE O-III
FILTER THICKNESS (WITHOUT CELL) 3 mm
HBW (HALFBANDWIDTH) 4,5nm
CWL (CENTRAL WAVELENGTH) 502 nm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 50 x 50 mm
FILTER USAGE CCD, IR-Cut, O-III
FILTER MOUNTED Unmounted
TYPE OF FILTER Narrowband
SINGLE OR SET? Single Filter
FILTER SHAPE square

65x65mm

MANUFACTURER Baader Planetarium
SKU (#) 2458434Z
WEIGHT (KG) 0.073
COLOUR Black
TRANSMISSION RANGE O-III
FILTER THICKNESS (WITHOUT CELL) 3 mm
HBW (HALFBANDWIDTH) 4,5nm
CWL (CENTRAL WAVELENGTH) 502 nm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 65 x 65 mm
FILTER USAGE CCD, IR-Cut, O-III
FILTER MOUNTED Unmounted
TYPE OF FILTER Narrowband
SINGLE OR SET? Single Filter
FILTER SHAPE square
Downloads

FAQ - Problems with filters can have the strangest causes

Halos - No Problem!