Baader H-alpha 2" unmounted f/2 Highspeed Filter 3.5 nm CMOS optimized (2961378U)

Baader H-alpha 2" unmounted f/2 Highspeed Filter 3.5 nm CMOS optimized (2961378U)

Description

The Baader H-alpha 2" unmounted (Ø 47.4 mm, 2 mm thick) f/2 Highspeed Filter 3.5 nm is designed for extremely fast optical systems such as the Celestron RASA f/2 astrographs. It is specially selected for Baader FCCT (Filter Changer Camera Tilter) filter sliders, compatible with QHY cameras and similar devices.

Optimized for CMOS sensors, it also works excellently with CCD technology. With a central wavelength of 656.3 nm and a 3.5 nm bandwidth, it delivers maximum contrast even under heavy light pollution (Bortle 9 to 6). It reduces star sizes, highlights the finest H-alpha nebula details, and harmonizes exposure times with O-III and S-II filters.

Featuring precision planeoptical polishing and Reflex-Blocker™ hard coating, it minimizes reflections. Blackened edges with telescope-side indicator ensure correct orientation. Life-Coat™ sealed protection guarantees long-term durability. Lightweight (0.01 kg) and robust, it is sold individually and is indispensable for high-speed H-alpha astrophotography.

Technical Specifications

• Manufacturer: Baader Planetarium

• Product SKU: 2961378U

• EAN code: 4047825051004

• Net weight: 0.01 kg

• Filter type: H-alpha f/2 Ultra Highspeed

• Mount: unmounted

• Shape: round

• Diameter: 47.4 mm (2" without cell)

• Thickness: 2 mm

• Central wavelength (CWL): 656.3 nm

• Half bandwidth (HBW / FWHM): 3.5 nm

• Transmission: H-alpha line

• Coating: Reflex-Blocker™ hard coated, planeoptically polished

• Durability: Life-Coat™ sealed edges

• Edges: blackened with telescope-side indicator

• Suitable f/ratio: < f/2.3

• Compatibility: Celestron RASA 8", Baader FCCT, QHY cameras, CMOS and CCD

• Application: H-alpha astrophotography, nebulae, light-polluted skies

• Packaging: single filter