Optolong SHO Filter Kit 1.25 inch

Optolong Filters SHO Filter Kit 1.25″ is a compact and high-quality filter set for astrophotography with smaller telescopes or cameras that support 1.25″ filters. The kit contains three narrowband filters - H-alpha, OIII and SII - with a bandwidth of 7 nm. These filters allow the main emission lines of nebulae to pass through while blocking interfering artificial light and light pollution.

With its 7 nm bandwidth, the set is an excellent choice for astrophotographers seeking balance between contrast, light output and practical exposure times. You'll capture emission nebulae with rich detail and an improved signal-to-noise ratio, even from the city. By combining H-alpha, OIII and SII filters, you can create images in the famous SHO or Hubble palette, with dramatic colors and textures that normally remain invisible.

The filters feature multilayer anti-reflection coatings for maximum transmission and minimal halos. The optically polished glass ensures sharp, high-contrast images. Thanks to the sturdy aluminum filter cells, they fit perfectly into all standard 1.25″ filter wheels and adapters.

Observation goals
This filter set is ideal for astrophotographers who want to photograph emission nebulae such as the Orion Nebula, Rosette Nebula or the Veil Nebula from light-polluted areas. Due to the 7 nm bandwidth, the filters are particularly suitable for beginners and advanced photographers who want to combine relatively short exposure times with high-contrast results.

Specifications

• Type: Narrowband filter set (H-alpha, OIII, SII)
• Bandwidth: 7 nm (FWHM) per filter
• Diameter: 1.25″ (31.75 mm)
• Emission lines: H-alpha 656 nm | OIII 500 nm | SII 672 nm
• Suitable for: Astrophotography, SHO combination (Hubble palette)
• Coating: Multiple anti-reflection coating, high transmission
• Housing: CNC-machined aluminum filter cells