Filter Chroma H-alpha 3 nm 31 mm, unmounted (SKU: CT-27001-31D) all astro filters opinie

3479 zł price without VAT: 2828,46 zł 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 3nm 31mm Unmounted (SKU: CT-27001-31D) is a narrowband filter for astrophotography, designed for use in filter wheels and unmounted systems. Its very narrow passband provides excellent H-alpha signal separation, enhancing contrast and detail in emission nebula images.

Key features

• 3 nm band centered on the H-alpha line (approx. 656 nm)
• transmission in the band of approximately 99%
• hard coatings applied using the reactive magnetron sputtering method, resistant to weather conditions and temperature changes
• anti-reflective coatings on the back eliminate reflections and improve transmission
• all Chroma Astronomy filters are parfocal to each other
• optimized for use in f/4 and slower systems, also adapted to f/3 systems
• the filter is not intended for observing the Sun

Set components

• H-alpha filter 3 nm 31 mm unmounted – CT-27001-31D

Technical parameters

• type: narrowband H-alpha filter for astrophotography
• diameter: 31 mm, unframed
• bandwidth: 3 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)