SVBONY 2" OIII Narrowband Filter 7 nm for Deep Sky Observation

The SVBONY 2-inch OIII filter is an essential tool for astrophotography of deep sky. Designed to enhance the contrast between nebulae and the surrounding sky, it allows you to capture clear and detailed images even under a sky polluted by urban light. With a narrow bandwidth of 7 nm centered at 500 nm, this filter optimizes the observation of dark nebulae while blocking wavelengths responsible for light pollution.

Features :

• Diameter: 2 inches
• Bandwidth: 7 nm (centered at 500 nm)
• Transmission: 80% on the OIII 500 nm line
• Infrared rejection: 700 nm to 1100 nm
• Material: Glass imported from Germany with ion-assisted multilayers
• Filter thickness: 1.85 mm
• Optical surface: quality 60/40 according to MIL-O-13830
• Parallelism: <30 on both surfaces
• Clear aperture: 45 mm
• Reduced transmission to 0.1% for Hg wavelengths (435 nm, 578 nm) and Na (589 nm)

Advantages :

• Enhances contrast for sharp observations and photographs even in slightly polluted environments.
• No need for a separate IR-Cut filter, this filter effectively blocks infrared wavelengths.
• Lightweight and durable filter cell, made from solid metal, ensuring a long lifespan.
• Delivered with a protective plastic case lined with high-pressure EVA for secure transport.

Optimize your deep sky observations with the SVBONY OIII filter, designed to provide unmatched image clarity, even in urban areas.