Baader H-alpha Ultra-Narrowband-Filters (3.5nm) – CMOS-optimized
- Baader H-alpha Ultra-Narrowband Filter – Premium Grade
- 3.5 nm FWHM (to harmonize the exposure time with O-III / S-II), recommended for optical systems from > f/3.4
- 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 planeoptically polished – with sealed coating edges (Life-Coat™)
- Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
- Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies
Transmission curve
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Technical Data:
| FILTER SIZE | 1 25 inch | 2 inch | 36mm. |
|---|---|---|---|
| MANUFACTURER | Baader Planetarium | Baader Planetarium | Baader Planetarium |
| SKU (#) | 2961325 | 2961328 | 2961327 |
| EAN CODE | 4047825047540 | 4047825047571 | 4047825047564 |
| WEIGHT (KG) | 0.01 | 0.01 | 0.00 |
| TRANSMISSION RANGE | H-alpha | H-alpha | H-alpha |
| FILTER THICKNESS (WITHOUT CELL) | 2 mm | 2 mm | 2 mm |
| HBW (HALFBANDWIDTH) | 3.5 nm | 3.5 nm | 3.5 nm |
| CWL (CENTRAL WAVELENGTH) | 656,3 nm | 656,3 nm | 656,3 nm |
| AR-COATING |
Reflex-Blocker™ hard coated
planeoptically polished
|
Reflex-Blocker™ hard coated
planeoptically polished
|
Reflex-Blocker™ hard coated
planeoptically polished
|
| FILTER USAGE |
CMOS
CCD
H-alpha
|
CMOS
CCD
H-alpha
|
CMOS
CCD
H-alpha
|
| FILTER MOUNTED | Mounted (LPFC 6mm) | Mounted (LPFC 6mm) | Unmounted |
| TYPE OF FILTER | Ultra-Narrowband | Ultra-Narrowband | Ultra-Narrowband |
| SINGLE OR SET? | Single Filter | Single Filter | Single Filter |
| 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.