Filter Chroma H-alpha 3 nm 65x65 mm, unmounted (SKU: CT-27001-65X65) all astro filters opinie

6337 EUR price without VAT: 5152 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 3 nm 65x65 mm Unmounted (SKU: CT-27001-65X65) is a narrowband filter in a large square format, designed for the most demanding astrophotography systems. Its narrow passband of 3 nm allows for precise extraction of H-alpha emission, providing maximum contrast and detail in images of emission nebulae.

Key features

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

Set components

• H-alpha filter 3 nm 65x65 mm unframed – CT-27001-65X65

Technical parameters

• type: narrowband H-alpha filter for astrophotography
• format: 65x65 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)