ToupTek Narrowband (6.5 nm) SHO Filter Set (2") offers an unbeatable price/performance ratio for observers dedicated to narrowband astrophotography. The filter set allows for detailed photography of astronomical objects (e.g., emission nebulae) along the hydrogen-alpha (Ha), oxygen-III (OIII), and sulfur-II (SII) lines. The filters, with a bandwidth of only 6.5 nm, are effective in reducing the effects of urban light pollution.
The outstanding feature of the ToupTek Narrowband SHO Filter Set is the 6.5 nm bandwidth, which ensures maximum contrast and detail richness. The filters are manufactured from special, high-purity, and thermally stable quartz-based optical glass. The surface treatment is done using IAD technology, which provides a more uniform and corrosion-resistant quality compared to traditional vacuum deposition. All these features guarantee excellent image quality and long lifespan.
Main features of the filter set:
- Transmission bandwidth: 6.5 nm
- Filter size: 2"
- H-alpha central wavelength: 656.3 nm
- SII central wavelength: 671.6 nm
- OIII central wavelength: 500.7 nm
- Transmission: >90%
- Coating: IAD (Ion Assisted Deposition) and anti-reflective coating
- Material: Quartz optical glass
- Blackened filter edges
The precise construction and quality materials of the ToupTek SHO Narrowband Filter Set ensure durability and reliability, backed by ToupTek's many years of manufacturing experience.