Baader 2" mounted f/2 Halpha OIII SII filters

Baader 2" mounted f/2 Halpha OIII SII filters

DESCRIPTION
Specially engineered for ultra-fast systems like Celestron’s RASA, this Baader narrowband filter set includes H-Alpha (3.5 nm), O-III (4 nm), and S-II (4 nm) filters in standard 2" mounts. The Reflex-Blocker™ coatings suppress halos, and the Life-Coat™ technology ensures durability for a lifetime. Designed for perfect 1:1:1 exposures on modern CMOS sensors, each filter is sealed, has blackened edges, and includes a telescope-side marker for correct orientation. These filters maximize contrast and resolution, even under heavily light-polluted skies.

TECHNICAL SPECIFICATIONS

• Manufacturer: Baader Planetarium

• Type: ultra-narrowband filters

• Mounting: 2" (M48) mounted

• Bandwidths:

  • H-Alpha: 3.5 nm FWHM

  • O-III: 4 nm FWHM

  • S-II: 4 nm FWHM

• Designed for CMOS cameras, CCD compatible

• Ideal for fast optics ≤ f/2.3

• Balanced exposure 1:1:1

• Reflex-Blocker™ coating to suppress halos

• Life-Coat™ for anti-aging protection

• Blackened edges to reduce internal reflections

• Front side marker: black outer edge facing telescope

• Sealed coating edge to prevent moisture

• Parfocal design with standardized thickness

• Excellent for high light pollution zones (Bortle 6 to 9)