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Old 29-03-2023, 06:37 PM
rueffy (Jarrod)
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Join Date: Sep 2022
Location: Adelaide
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Baader f/2 Highspeed SII Narrowband CCD Filter 2"

A high speed SII filter designed for fast optics f/1.8 to f/3.5 to eliminate band shifting. The filter is also optimised for CCD camera sensors. Excellent condition, only used once. $160 - price includes postage within Australia. Pickup available in Adelaide.

Product Details:
Baader f/2 Highspeed Narrowband CCD Filter with preshift and LPFC (low profile filter cell): S-II - 2"

Baader's new f/2 Highspeed Narrowband Filters are designed especially for the delicate requirements of extremely fast astrograph optics, such as Hyperstar, RASA, and ultra-fast instruments from TEC/AP/ASA/etc. Conventional narrowband filters cause a heavy loss in transmission due to the strong CWL-shift. In extreme cases the CWL even shifts out of the FWHM (CWL= Center-wavelength; FWHM= full width half maximum).

Therefore these filters have 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 the effective use of extremely fast optics for high contrast imaging of emission nebulae. Using these filters between f/1,8 and f/3,5 shows a dramatic improvement compared to any regular set of narrowband-filters.

Manufacturer part # FSIIHS-2 or 2459399

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Last edited by rueffy; 11-04-2023 at 10:46 AM. Reason: Price drop
  #2  
Old 31-03-2023, 10:12 AM
rueffy (Jarrod)
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Join Date: Sep 2022
Location: Adelaide
Posts: 6
Price drop

Price dropped from $250 to $220
  #3  
Old 03-04-2023, 09:04 AM
rueffy (Jarrod)
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Join Date: Sep 2022
Location: Adelaide
Posts: 6
Price drop

Price dropped from $220 to $200
  #4  
Old 06-04-2023, 10:11 AM
rueffy (Jarrod)
Registered User

rueffy is offline
 
Join Date: Sep 2022
Location: Adelaide
Posts: 6
Price drop

Price dropped from $200 to $180
  #5  
Old 11-04-2023, 10:46 AM
rueffy (Jarrod)
Registered User

rueffy is offline
 
Join Date: Sep 2022
Location: Adelaide
Posts: 6
Price drop

Price dropped from $180 to $160
 

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