Svbony OIII 7 nm 2 Filter (SKU: W9121B) all astro filters opinie

229 USD price without VAT: 186 USD Shop online: ● ready for shipping  Shop in Warsaw (qty): 1 ● ready for shipping  Shop in Chorzow (qty): ● on request

CHEAP DELIVERY TO EUROPEAN COUNTRIES CHECK IT OUT!

SVBONY O-III SV160 2" 7 nm is a professional astrophotographic filter with a half-transmissivity window (FWHM) of 7 nm. It transmits light with a wavelength of 500.7 nm emitted by ionized oxygen atoms, the registration of which is particularly important when photographing emission nebulae.

This filter combines the ability to almost completely eliminate the unwanted component coming from sodium and mercury lamps with high transmittance for the O-III spectral line, one of the most important from the point of view of astrophotography . It was made on a high-quality B-270 glass substrate, additionally secured with a multi-layer coating applied in the ion-assisted deposition process. Thanks to this technology, the obtained coating effectively stabilizes the position of the maximum permeability band, and also has a protective function due to increased resistance to scratches.

Attention! The O-III filter is not recommended for visual observation or solar observation.

The most important features of the SVBONY O-III SV160 2" 7 nm filter

• a bandpass filter made on a high-quality glass substrate, allowing O-III band lines to pass through
• filter covered with a layer of increased scratch resistance
• Half Bandwidth (FWHM) of 7 nm
• high ability to cut light pollution in the range from 300 to 700 nm

Technical parameters

• filter type: bandpass filter
• substrate: B-270 glass
• Filter diameter: 2"
• Optical diameter (filter aperture): 45 mm
• filter thickness: 1.85 mm
• filter shape: round
• pass bands: O-III (500.7 nm)
• location of the maximum peak of O-III band permeability: 500 nm
• half bandwidth (FWHM): 7 nm
• maximum transmission for O-III band: 80%
• blocked light pollution bands: mercury lamps (435.8 nm, 546.1 nm, 577 nm, 578.1 nm), sodium lamps (598 nm, 589.6 nm, 615.4 nm, 616.1 nm)
• optical density equivalent for blocked lines: OD3 in the range of 300 - 1000 nm
• filter coating: multi-layer coating (MC)
• quality of surface finish: λ/4
• parallelism: <30"
• surface quality index: 60/40 (according to MIL-O-13830 standard)
• weight: 5.5g

Set elements

• SVBONY O-III SV160 2" 7 nm filter

Guarantee

12 months