Optolong L-Para 2” Dual Band Filter: High Quality for Emission Nebulae
The Optolong L-Para 2” Dual Band Filter is designed to enhance astrophotography by overcoming light pollution. With a 10 nm bandwidth for both H-Alpha (Ha) and Oxygen III (OIII) wavelengths, this filter delivers stunning images with exceptionally sharp details and high contrast, ideal for emission nebulae.
Key Features
• Bandwidth: 10 nm for both Ha and OIII wavelengths, maximizing nebula definition.
• Optical Material: Made with Schott monolithic optical substrate (non-glued) for superior quality.
• Glass Thickness: 2.0 mm (for both 1.25” and 2” filters).
• Surface Quality: 60/40, compliant with US military standard MIL-O-13830.
• Parallelism: 30”, ensuring distortion-free images.
• Band-Pass Transmission: TBD (to be determined for maximum precision).
• Optical Coating: Fully multi-coated to reduce reflections and improve light transmission.
• Optical Flatness: 1/4 λ (wavefront) precision for optimal sharpness.
Available Sizes
• 1.25”
• 2”
Perfect for Astrophotography
The Optolong L-Para filter is the perfect choice for astrophiles seeking peak performance even under light-polluted skies. Its advanced optical specifications make it an invaluable tool for capturing every detail of emission nebulae with vibrant colors and impeccable contrast.