Filter Chroma H-alpha 5 nm 50x50 mm, unmounted (SKU: CT-27002-50X50) all astro filters opinie

1872 EUR price without VAT: 1522 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-alpha 5 nm 50x50 mm Unmounted (SKU: CT-27002-50X50) is a narrowband filter in a square format, designed for professional astrophotography applications. The 5 nm bandwidth provides high H-alpha signal transmission while maintaining very good selectivity, making the filter ideal for use in faster optical systems as well.

Key features

• 5 nm bandwidth optimized for the H-alpha line (approx. 656 nm)
• bandwidth transmission at approximately 99%
• hard coatings applied using the reactive magnetron sputtering method – resistant to moisture and changing environmental conditions
• anti-reflective coatings on the back surface minimize reflections and ghosting
• all Chroma Astronomy filters are parfocal to each other
• designed for use in optical systems f/4 and faster, also recommended for f/3
• not suitable for observing the Sun

Set components

• H-alpha filter 5 nm 50x50 mm unmounted – CT-27002-50X50

Technical parameters

• type: narrowband H-alpha filter for astrophotography
• format: 50x50 mm, unframed
• bandwidth: 5 nm
• central wavelength (CWL): approx. 656 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)