Baader f/2 Highspeed Filter H-alpha 50x50 mm
Product.Nr.:
BP#2459389
Manufacturer: Baader Planetarium
310,00 EUR
incl. 19 % VAT
-
Nicht auf Lager
products condition NewCondition
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product description
- Narrowband f/2 CCD Filter
- Planoptically polished (1/4 Lambda)
- For f/1.8 to f/3.5
- Hardcoated
- Non aging - Sealed coating edges
- Size : 50x50 mm square
- Thickness: 3 mm
- CWL: H-alpha (656.3 nm)
- Baader-filterbox, combinable
New f/2 Highspeed Narrowband Filter
50x50 mm H-alpha Filter is designed especially for the delicate requirements of extremely fast astrograph optics, in particular Celestron 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.
Therefore these filter has a CWL-preshift which matches f/2 to f/3 perfectly. Also 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.
Note:
The preferred oriention of the filter is to have the highest reflectivity side facing skyward.
Scope of Delivery
- Baader f/2 Highspeed Filter H-alpha 50x50 mm
- Baader-filterbox
CWL= Center-wavelength / FWHM= full width half maximum.
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