Filter Chroma H-beta 5 nm 65x65 mm, unmounted (SKU: CT-27005-65X65) all astro filters opinie

5978 EUR price without VAT: 4860 EUR Shop online: ● on request  Shop in Warsaw (qty): ● on request  Shop in Chorzow (qty): ● on request

CHEAP DELIVERY TO EUROPEAN COUNTRIES CHECK IT OUT!

The Chroma H-beta 5 nm 65x65 mm Unmounted (SKU: CT-27005-65X65) is a narrowband filter in a large square format, designed for advanced astrophotography of emission nebulae. The 5 nm bandwidth effectively isolates the H-beta line at 486 nm, providing high image contrast while providing greater light transmission than filters with a narrower 3 nm bandwidth.

Key features

• bandwidth of 5 nm for the H-beta line (approx. 486 nm)
• transmission in the band of approximately 99%
• hard coatings applied using the reactive magnetron sputtering method – durability and resistance to external conditions
• anti-reflective coatings on the back surface reduce reflections and ghosting
• all Chroma Astronomy filters are parfocal to each other
• designed for optical systems f/4 and faster, also works well at f/3
• not suitable for observing the Sun

Set components

• H-beta filter 5 nm 65x65 mm unframed – CT-27005-65X65

Technical parameters

• type: H-beta narrowband filter for astrophotography
• format: 65x65 mm, unframed
• bandwidth: 5 nm
• central wavelength (CWL): approx. 486 nm
• transmission: approx. 99%
• optical substrate: 3.0 mm thick glass
• coating technology: reactive magnetron sputtering (hard coatings)
• coating construction: main layer on the front side, AR coatings on the back side
• Transmitted wavefront accuracy: better than 0.25 waves/inch
• parfocal: yes (with other Chroma Astronomy filters)
• production: USA (Vermont)