Baader Planetarium 1.25" f/2 Highspeed Filter Set
Baader's new f/2 Highspeed Narrowband filter sets contain H-Alpha, OIII, and SII filters and are made specifically for the sensitive requirements of exceptionally fast astrograph optics, such as Hyperstar, RASA, and extremely fast instruments from TEC, AP, ASA, etc. Ordinary narrowband filters generate a heavy loss in transmission because of the strong CWL (center-wavelength) shift. In severe circumstances, the CWL even shifts out of the FWHM (full width half maximum).
As a result, these filters have a CWL-preshift which flawlessly matches f/2 to f/3. Furthermore, the FWHM is enhanced. Despite the typical line broadening with such fast optical trains, these filters are still able to produce peak contrast. These filters permit the effective use of tremendously fast optics for maximum contrast imaging of emission nebulae for the first time. Compared with a regular set of narrowband filters, using these highspeed filters between f/1.8 and f/3.5 will exhibit drastic improvement.
Baader Planetarium Product Number: FHSS-1
- Additional Information
SKU BA-FHSS-1 Manufacturer Baader Type of Filter H-Alpha, Oxygen III, Sulfur II Filter Usage Imaging Single or Set? Filter Set Filter Size 1.25" Filter Shape Round Filter Mounted? Mounted Warranty 1 Year Warranty
- Included Items
- Baader 1.25" f/2 Highspeed Narrowband H-Alpha Filter
- Baader 1.25" f/2 Highspeed Narrowband O-III Filter
- Baader 1.25" f/2 Highspeed Narrowband S-II Filter
- Questions & Answers
Product QuestionsEven though they are designed for fast optical systems, is there something about this filter set that would make them undesirable for an f7 or above system? If so, is there a more suitable line of narrow band filters?Question by: Sushiotabemasho on Dec 7, 2014 4:38:30 AMThe high speed narrowband set has its passbands broadened and shifted in such a way that they come "on-band" at f/1.8-f/3. At f/7, they will not work as intended as the center wavelength will shift slightly off band - they will still transmit the intended wavelength, but the pecentage of transmission will be lower.
Baader makes standard narrowband filters with the BA-FHALN-1, BA-FOIIIN-1 and BA-FSIIN-1 available separately rather than as a set. These would be better options if you are primarily shooting at f/7.Answer by: Chris (Admin) on Dec 9, 2014 11:28:11 AM
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