Baader 2" F2 Highspeed H-alpha Filter: Baader designed these filters especially for the delicate requirements of extremely fast astrograph optics, in particular Hyperstar and Celestron's New Rowe-Ackermann Astrograph (RASA).
Conventional narrowband filters cause a huge loss in transmission due to the strong centre wavelength (CWL) shift. In extreme cases the strong centre wavelength shift can cause a shift of the full width half maximum (FWHM).
The Baader highspeed narrowband filters have a CWL preshift which matches F2 to to F3.5 and the FWHM is also optimised. They are hard coated AND planeoptically polished.
These Baader filters are able to deliver maximum contrast. They allow the effective use of fast optics with high contrast emission nebulae imaging.
A dramatic improvement compared to any regular set of narrowband filters, when imaging between F1.8 and F3.5.
Features:
- F/2 Highspeed Filterset consisting of 3 Filter: H-alpha, O III and S II
- Highspeed Narrowband Filter are designed especially for the delicate requirements of extremely fast astrograph optics, in particular Hyperstar and RASA
- Conventional narrowband filters cause a heavy loss in transmission due to the strong CWL-shift
- In extreme cases the CWL even does shift out of the FWHM (CWL= Centre-wavelength / FWHM= full width half maximum), therefore these filters have a CWL-preshift which matches f/2 to f/3 perfectly
- The FWHM is optimized, in spite of the typical line broadening with such fast optical trains they are able to deliver maximum contrast
- For the first time these filters allow to use fast optics really effectively with high contrast emission nebulae imaging
- Using these filters between f/1,8 and f/3,5 shows a dramatic improvement compared to any regular set of narrowband-filters
Specifications:
- Filter Size: 2"
- Weight: 0.1970 kg
- Filter Shape: Round
- Visual Or Imaging: Imaging
- Single Or Set: Filter-Set
- Type Of Filter: Narrowband
- Filter Mounted: Mounted (LPFC 6mm)
- Transmission Range: Multiple Bands
- Filter Thickness (Without Cell): 2 mm
- CWL (Central Wavelength): 656,3 nm;502 nm;673 nm
- AR-Coating: Dielectrically Coated, Planeoptically Polished
- Filter Usage: CCD, Deep Sky, f/2 Highspeed, H-alpha, O-III, S-II
Kit Contents:
Baader F/2 Highspeed-Filterset 2-Inch
1- H-alpha (2459397)
2- OIII (2459398)
3- SII (2459399)
Protective boxes
User Operating Instructions Manual
For more information about, Baader F/2 Highspeed-Filterset 2-Inch H-alpha / OIII / SII website.
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