Optolong HSO / SHO 3 nm 36 mm (SKU: SHO-3nm-36 / SHO-3-36)

The Optolong SHO 3 nm 36 mm filter set is designed specifically for astrophotography, catering to monochrome cameras or specially modified SLRs. These filters, part of the HSO palette, enable breathtaking images of emission nebulae and remnants of supernova explosions. By utilizing advanced filter production technology, Optolong achieves exceptionally narrow passbands while maintaining high optical efficiency. As a result, the filters yield stunning visuals reminiscent of photographs captured by the Hubble space telescope. Furthermore, the Optolong SHO 3 nm 36 mm filters excel in blocking light pollution from sodium and mercury lamps, making them ideal for capturing celestial beauty in urban areas.

These filters boast a full multi-layer anti-glare coating, meticulously applied through ion implantation techniques. This not only ensures optical excellence but also guarantees remarkable durability and scratch resistance. Notably, the 36 mm filters do not feature an aluminum frame.

Key Features of the Optolong SHO 3 nm 36 mm Filter Set:

Ultra-Narrow Passbands: Hα, S II, and O III bands have an impressive half-width of only 3 nm.

Anti-Glare Coating: Full multi-layer coating eliminates glare and safeguards against scratches.

Stable Transmission: The transmission band maxima remain stable regardless of changes in ambient temperature.

Effective Light Pollution Elimination: The filters effectively block light pollution and minimize the skyglow effect.

Technical Specifications:

• Filter Type: HSO
• Filter Diameter: 36 mm
• Filter Thickness: 2 mm
• Hα Line Passband Midpoint: 656.3 nm
• Hα Line Half Bandwidth (FWHM): 3 nm
• Hα Line Band Transmission: 85%
• S II Line Passband Center: 672 nm
• S II Line Half Bandwidth (FWHM): 3 nm
• S II Line Band Transmission: 85%
• O III Line Passband Center: 500 nm
• O III Line Half Bandwidth (FWHM): 3 nm
• O III Line Band Transmission: 85%
• Blocked 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)
• Anti-Reflective Coating: Full Multi-Layer Coating (FMC)
• Frame: Absent

Set Components:

• Optolong Hα 36 mm Filter
• Optolong S II 36 mm Filter
• Optolong O III 36 mm Filter

Guarantee:

The Optolong SHO 3 nm 36 mm filter set is backed by a 24-month guarantee.