Our company is involved in preparing official permits from the Polish Ministry of Development and Technology, which allows us to export all dual-use drones, optics, and portable radiophones without VAT on the Polish side / and without VAT on the Ukrainian side.
ZWO narrowband 31 mm (unmounted) NB7nm set of three filters (HSO, SKU: ZWO NB7nmD31)
352.52 € net price (non-EU countries)
Anatolii Livashevskyi
Product Manager
/ 
+48721808900
+48721808900
+48721808900
[email protected]
Description
ZWO 31 mm Narrowband HSO Filter Set (Unmounted) – Enhanced 7 nm Precision
Discover the latest innovation from ZWO, a leader in professional astrophotography equipment. Introducing the upgraded narrowband filter set, meticulously designed for capturing breathtaking images in the HSO color palette.
Product Highlights:
- High Transmission Efficiency: Offers approximately 90% maximum transmission, ensuring vibrant image quality.
- Ultra-Narrow Bandwidth: Each filter has a precise half-bandwidth of 7 nm, perfect for isolating specific wavelengths.
- Advanced Coating Technology: Full multilayer coating eliminates common halo effects, enhancing clarity and detail.
These filters are expertly crafted on a robust 2 mm glass substrate, making them ideal for enhancing celestial object contrast against the night sky. Unlike conventional filters, ZWO's narrowband set excels in light-polluted environments, allowing for vivid captures of nebulae, including emission nebulae, planetary nebulae, and supernova remnants.
Usage Note: For optimal results, ensure the correct orientation of the Hα and SII filters. The side with the purple coating should face the camera.
Technical Specifications:
- Filter Type: Rimless narrowband filter
- Filter Diameter: 31 mm
- Filter Thickness: 2.0 ± 0.03 mm
- Half-Bandwidth (FWHM): 7 nm
- Maximum Transmission for 656 nm (Hα) Line: Approximately 90%
- Maximum Transmission for 672 nm (SII) Line: Approximately 90%
- Maximum Transmission for 500 nm (OIII) Line: Approximately 90%
- Infrared (IR) Blocking Range: 700 - 1100 nm
- Out-of-Band Transmission: Less than 0.1%
- Equivalent Optical Density for Blocked Range: OD3
- Coating Type: Full multilayer coating (FMC)
Kit Components:
- ZWO Hα 7 nm Filter
- ZWO SII 7 nm Filter
- ZWO OIII 7 nm Filter
- Protective Plastic Boxes for Each Filter
Astrophotographers can enhance their cosmic imagery with the ZWO HSO 31 mm Narrowband Filters, even under challenging lighting conditions. Embrace the advanced capabilities of these filters to capture the universe's beauty with unmatched precision and depth.
Data sheet
Official permits of the Ministry of Development and Technology
Our company is involved in preparing official permits from the Polish Ministry of Development and Technology, which allows us to export all dual-use drones, optics, and portable radiophones without VAT on the Polish side / and without VAT on the Ukrainian side.