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Baader f/2 2'' narrowband filter set. Mint! Offer Pending

Price - $825.00

Ad Number: 106731

Posted: 28 May 2017

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A whole Ha, Oiii and SII set which are actually unused.

OPT sells it new for $984

Asking for $825 shipped to CONUS.
Paypal preferred, MO is OK. There is 3% fee with PP business transaction.
Thanks for looking!


Below is the official description

This Baader 2" f/2 Highspeed Filter Set was made specifically for the sensitive requirements of exceptionally fast astrograph optics.
These filters are still able to produce peak contrast despite the typical line broadening seen with fast optical trains.
This Baader 2" f/2 Highspeed Filter Set permits the effective use of tremendously fast optics for high contrast imaging of emission nebulae for the first time.
Includes H-Alpha, O-III, and S-II round, mounted 2" filters.


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.

General


  • Condition Mint!
  • Location San Jose, CA



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