Optolong LRGB + HSO 31 mm (SKU: OPL-LRGBNB-31)

The Optolong LRGB + HSO 31 mm filter set is a comprehensive package of seven rimless astronomical filters designed specifically for professional astrophotography. With its impressive features and advanced technology, this filter set ensures exceptional image quality and outstanding performance in capturing celestial wonders.

The LRGB filters in this palette are known for their exceptional efficiency, with each filter surpassing 95% transmission in the maximum band. By utilizing high-quality glass substrates and employing a full multilayer coating on the surface, these filters produce vivid and highly contrasting images. Notably, the separation of the G and R filter peaks has been carefully selected to effectively eliminate signal interference from sodium lamps, which are a significant source of light pollution.

The HSO filters, on the other hand, are narrowband filters specifically designed for capturing emission nebulae, including renowned subjects like the Pillars of Creation. With their small half-widths in the Hα, S II, and O III bands, these filters enable astrophotographers to capture stunning images even under challenging conditions such as during a full moon.

All filters included in this kit feature a full multi-layer anti-glare coating applied using advanced ion implantation techniques. This not only ensures optimal optical performance but also enhances their durability, making them highly resistant to scratches.

Key Features of the Optolong LRGB + HSO 31 mm Filter Set:

High-Quality Filters: The LRGB and HSO filters are crafted from top-quality glass provided by the renowned Schott company, ensuring exceptional performance and reliability.

Full Multi-Layer Coating: The filters are equipped with a comprehensive anti-glare coating that eliminates unwanted reflections and protects the surface against scratches, ensuring long-lasting optical clarity.

Balanced RGB Channels: The RGB filters in this set offer equal weights across all channels, enabling accurate color reproduction and balanced imaging results.

Enhanced Passband Separation: The R and G filters feature increased separation in passbands, effectively blocking spectral lines emitted by sodium lamps, which are responsible for significant light pollution.

Technical Specifications:

• Filter Type: LRGB, HSO
• Filter Diameter: 31 mm
• Transmission for LRGB Palette Bandwidth: 95%
• Transmission Beyond LRGB Palette Transmission Range: 0.1%
• Optical Density Equivalent Beyond LRGB Palette Transmission Range: OD3
• IR Cut-Off in Luminance Channel: 700 - 1100 nm
• Hα Line Passband Midpoint: 656.3 nm
• Hα Line Half Bandwidth (FWHM): 7 nm
• Transmission for Hα Line Band: 85%
• S II Line Passband Center: 672 nm
• S II Line Half Bandwidth (FWHM): 6.5 nm
• Transmission for S II Line Band: 80%
• O III Line Passband Center: 500 nm
• O III Line Half Bandwidth (FWHM): 6.5 nm
• Transmission for O III Line Band: 80%
• Substrate: Schott Optical Glass
• Filter Thickness: 2 mm
• Surface Quality Index: 60/40
• Surface Finish: Polished
• Anti-Reflective Coating: Full Multi-Layer Coating (FMC)
• RMS Execution Accuracy: λ / 4

Elements Included in the Set:

• Optolong UV/IR-Cut 31 mm Filter
• Optolong R-CCD 31 mm Filter
• Optolong G-CCD 31 mm Filter
• Optolong B-CCD 31 mm Filter
• Optolong Hα 31 mm Filter
• Optolong S II 31 mm Filter
• Optolong O III 31 mm Filter

Warranty:

The Optolong LRGB + HSO 31 mm Filter Set comes with a 24-month warranty, ensuring peace of mind and customer satisfaction.

Experience the Optolong LRGB + HSO 31 mm Filter Set and unlock the full potential of your astrophotography endeavors. Capture breathtaking celestial images with unprecedented clarity, contrast, and color fidelity.