Baader Planetarium H-alpha f/3 Ultra-Highspeed-Filters (3.5nm) - CMOS-Optimized
Baader Planetarium H-alpha f/3 Ultra-Highspeed-Filters (3.5nm) - CMOS-Optimized
Size Option
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Product Description
This new generation of Baader CMOS-filters features:
- 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
Size Options
| SIZE OPTION | 1.25 inch | 2 inch | 31 mm | 36 mm | 50.4 mm | 50mm x 50mm | 65mm x 65mm |
| SKU | 2961350 | 2961353 | 2961351 | 2961352 | 2961354 | 2961355 | 2961356 |
| EAN CODE | 4047825047618 | 4047825047649 | 4047825047625 | 4047825047632 | 4047825047656 | 4047825047663 | 4047825047670 |
| FILTER THICKNESS (WITHOUT CELL) | 2 mm | 2 mm | 2 mm | 2 mm | 3 mm | 3 mm | 3 mm |
| FILTER MOUNTED | Mounted | Mounted | Unmounted | Unmounted | Unmounted | Unmounted | Unmounted |
| FILTER SHAPE | Round | Round | Round | Round | Round | Square | Square |
Specifications
| MANUFACTURER | Baader Planetarium |
| SUITABLE FOR F/RATIO | f/3.4 to f/2.3 |
| TRANSMISSION RANGE | H-alpha |
| FILTER THICKNESS (WITHOUT CELL) | 2 mm |
| HBW (HALFBANDWIDTH) | 3.5 nm |
| CWL (CENTRAL WAVELENGTH) | 656.3 nm |
| AR-COATING | Reflex-Blocker™ hard coated, planeoptically polished |
| SPECIAL FEATURES | CMOS-Optimized with Life-Coat™ |
| FILTER USAGE | CMOS, CCD, H-alpha |
| TYPE OF FILTER | f/3 Ultra-Highspeed |
| SINGLE OR SET? | Single Filter |