Available from Jul / 2021
Baader 3.5/4nm Ultra-Narrowband- – Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)
- Baader H-alpha / O-III / S-II Ultra-Narrowband Filter Set – Premium Grade
- 3.5/4 nm FWHM (to harmonize the exposure time from H-alpha with O-III / S-II), recommended for optical systems from f/10 to f/3.5
- For highest contrast even at strongest light pollution:
- minimizes star size,
- emphasizes finest nebula detail
- indispensable under Bortle 9/8/7/(6) skies
- Reflex-Blocker™ hard coated and plane optically polished – with sealed coating edges (Life-Coat™)
- Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim
- Optimized for modern CMOS cameras, but excellent for CCD camera technologies
3 filters set:
- H-alpha 3.5 nm Ultra-Narrowband
- OIII 4 nm Ultra-Narrowband
- SII 4 nm Ultra-Narrowband
Wavelength(nm):
Technical Data:
| FILTER SIZE | 1 25 inch | 2 inch | 36 mm |
|---|---|---|---|
| MANUFACTURER | Baader Planetarium | Baader Planetarium | Baader Planetarium |
| SKU (#) | 2961670 | 2961673 | 2961672 |
| EAN CODE | 4047825104038 | 4047825104069 | 4047825104052 |
| WEIGHT (KG) | 0.18 | 0.20 | 0.19 |
| COLOUR | Black | Black | Black |
| TRANSMISSION RANGE | H-alpha / O-III / S-II | H-alpha / O-III / S-II | H-alpha / O-III / S-II |
| FILTER THICKNESS (WITHOUT CELL) | 2 mm | 2 mm | 2 mm |
| HBW (HALFBANDWIDTH) | 3.5 nm (H-alpha) / 4 nm (O-III / S-II) | 3.5 nm (H-alpha) / 4 nm (O-III / S-II) | 3.5 nm (H-alpha) / 4 nm (O-III / S-II) |
| CWL (CENTRAL WAVELENGTH) | 656,3 nm / 500,7 nm / 671,7 nm | 656,3 nm / 500,7 nm / 671,7 nm | 656,3 nm / 500,7 nm / 671,7 nm |
| AR-COATING | Reflex-Blocker™ hard coated, planeoptically polished | Reflex-Blocker™ hard coated, planeoptically polished | Reflex-Blocker™ hard coated, planeoptically polished |
| SPECIAL FEATURES | CMOS-optimized with Life-Coat™ | CMOS-optimized with Life-Coat™ | CMOS-optimized with Life-Coat™ |
| FILTER USAGE | CMOS, CCD, H-alpha, O-III, S-II | CMOS, CCD, H-alpha, O-III, S-II | CMOS, CCD, H-alpha, O-III, S-II |
| FILTER MOUNTED | Mounted (LPFC 6mm) | Mounted (LPFC 6mm) | Unmounted |
| TYPE OF FILTER | Ultra-Narrowband | Ultra-Narrowband | Ultra-Narrowband |
| SINGLE OR SET? | Filter-Set | Filter-Set | Filter-Set |
| FILTER SHAPE | round | round | round |
Available in other sizes and formats. If you do not find the size you want, contact us at info@lunatico.es.
