Product series:
The f/2 Ultra-Highspeed series of filters offer line filters with a very narrow full width at half maximum for extremely fast optical systems with an aperture ratio of f/3.4 to f/1.8, such as Celestron's RASA astrograph.
The narrow full width at half maximum allows maximum contrast even in severe light pollution conditions, minimising star size and making the finest nebula details accessible – indispensable under Bortle class 9/8/7/(6) skies.
Baader
Filters H-alpha CMOS f/2 Ultra-Highspeed 31mm
$ 302.00
ready for shipping in 1-2
weeks
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Filters SII CMOS f/2 Ultra-Highspeed 31mm
$ 284.00
ready for shipping in 24
h
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Filters OIII CMOS f/2 Ultra-Highspeed 31mm
$ 285.00
ready for shipping in 24
h
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Filters H-alpha CMOS f/2 Ultra-Highspeed 1.25"
$ 291.00
ready for shipping in 1-2
weeks
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Filters OIII CMOS f/2 Ultra-Highspeed 1.25"
$ 267.00
ready for shipping in 1-2
weeks
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Filters f/2 Ultra-Highspeed SII CMOS 1.25"
$ 263.00
ready for shipping in 1-2
weeks