Filter Chroma O-III 5 nm 65x65 mm, unmounted (SKU: CT-27007-65X65) all astro filters opinie

23929 zł price without VAT: 19454,47 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 O-III 5 nm 65x65 mm Unmounted (SKU: CT-27007-65X65) is a narrowband filter in a large square format, designed for the most demanding astrophotography systems. With a 5 nm bandwidth, it precisely isolates the O-III oxygen line at 500.7 nm, allowing for high-contrast, high-quality images.

Key features

• bandwidth of 5 nm in the O-III range (approx. 500.7 nm)
• bandwidth transmission at approximately 99%
• hard coatings applied using the reactive magnetron sputtering method – exceptional durability and stability of optical parameters
• anti-reflective coatings on the back surface reduce reflections and ghosting
• all Chroma Astronomy filters are parfocal to each other
• designed to work in optical systems f/4 and faster, also works well at f/3
• the filter is not intended for observing the Sun

Set components

• O-III filter 5 nm 65x65 mm unframed – CT-27007-65X65

Technical parameters

• type: O-III narrowband filter for astrophotography
• format: 65x65 mm, unframed
• bandwidth: 5 nm
• central wavelength (CWL): approx. 500.7 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)