Baader S-II f/3 Ultra-Highspeed-Filter(4nm)-CMOS-optimized (SPECIFY SIZE)

Article number: FCSIIMSU-X
Availability: More on the Way to us
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  • Baader H-alpha / O-III / S-II f / 3 Ultra-Highspeed Filter Set - Premium Grade
  • 3.5 / 4 nm half width (to harmonize the exposure time of H-alpha with O-III / S-II), recommended for extremely fast optical systems from  f/3.4 to f/2.3
  • Specially designed for the special filter requirements when used with fast f/3 optics
  • Enables the highest contrast even with the strongest light pollution, minimizes the size of the stars, makes the finest nebula details accessible - indispensable under Bortle 9/8/7/(6) sky
  • Reflex-Blocker ™ hard-coated and optically polished - with sealed coating edges (Life-Coat ™)
  • Blackened edges all around, with a filter front indicator in the form of a black outer edge on the front
  • Optimized for modern CMOS cameras, but ideally suited for CCD camera technologies
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