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

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

Characteristics:

• 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: German-imported glass with ion-assisted multi-layers
• Filter thickness: 1.85 mm
• Optical surface quality: 60/40 according to MIL-O-13830
• Parallelism: <30 on both surfaces
• Free opening: 45 mm
• Reduced transmission to 0.1% for Hg (435 nm, 578 nm) and Na (589 nm) wavelengths

Advantages:

• Enhances contrast for clear 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, machined from solid metal, ensuring long life.
• Supplied with a protective plastic case lined with high-pressure EVA for secure transportation.

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