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Baader 3.5 / 4nm Ultra-Narrowband Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)
Filtres Bande 3.5-4 Baader 5.4mm
New product
Baader 3.5 / 4nm Ultra-Narrowband Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)
Depending on availability from the supplier. Please contact us for more information
More info
Baader 3.5 / 4nm Ultra-Narrowband Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)
This new generation of Baader CMOS-filters features:
CMOS-optimized Baader Filters
- Increased contrast
- Ever more narrow passbands
- Reflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
- FWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s/n ratio
- Identical filter thickness to existing standards, with utmost care for parfocality
- Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter
- Each filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)
- Life-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment
| MANUFACTURER | Baader Planetarium |
|---|---|
| SKU (#) | 2961674 |
| EAN CODE | 4047825104076 |
| NET WEIGHT (KG) | 0.21 |
| COLOUR | Black |
| TRANSMISSION RANGE | H-alpha / O-III / S-II |
| FILTER THICKNESS (WITHOUT CELL) | 3 mm |
| HBW (HALFBANDWIDTH) | 3.5 nm (H-alpha) / 4 nm (O-III / S-II) |
| CWL (CENTRAL WAVELENGTH) | 656,3 nm / 500,7 nm / 671,7 nm |
| AR-COATING | Reflex-Blocker™ hard coated, planeoptically polished |
| SPECIAL FEATURES | CMOS-optimized with Life-Coat™ |
| FILTER SIZE | 50.4 mm |
| FILTER USAGE | CMOS, CCD, H-alpha, O-III, S-II |
| FILTER MOUNTED | Unmounted |
| TYPE OF FILTER | Ultra-Narrowband |
| SINGLE OR SET? | Filter-Set |
| FILTER SHAPE | round |