Optolong SII Narrowband 6.5nm Filter 2" / 1.25"

Optolong SII Narrowband 6.5nm Filter 2" / 1.25"

Introducing the Optolong SII Narrowband 6.5nm Filter

The Optolong SII Narrowband 6.5nm Filter is a high-performance astronomical filter designed to enhance deep-sky imaging. Available in both 2" and 1.25" sizes, this filter is specifically engineered to isolate the Sulfur II (SII) emission line at 672nm. By drastically reducing other transmissions, including those responsible for light pollution, this filter allows astrophotographers to capture stunning, high-contrast images of nebulae and other celestial objects. Crafted with precision and advanced coating technologies, the Optolong SII Narrowband 6.5nm Filter is an essential tool for any serious astrophotographer.

Features of the Optolong SII Narrowband 6.5nm Filter

• Ultra-Narrow Bandwidth: 6.5nm bandwidth centered at 672nm, isolating SII emissions while blocking out unwanted light.
• High Transmission Rate: 80% transmission at the 672nm SII line, ensuring bright and detailed images.
• Precision Double-Sided Polishing: Ensures high optical quality without affecting image sharpness.
• Advanced Coating Technology: Utilizes electron gun evaporation and ion-assisted deposition (IAD) for durable, scratch-resistant coatings.
• Superior Material: Made with Germany Schott optical glass and aviation-grade aluminum frame, anodized for durability.
• Laser Engraving: Permanent laser-engraved logo that never fades.
• Anti-Reflection Coating: Multi-layer coatings to prevent reflections and increase contrast.
• Standard Threading: Compatible with M48*0.75 for 2" and standard threads for 1.25".

Applications of the Optolong SII Narrowband 6.5nm Filter

This filter is perfect for a variety of astrophotography applications:

• Deep-Sky Imaging: Ideal for capturing detailed images of sulfur-rich nebulae and other celestial objects.
• Urban Astrophotography: Effectively reduces the impact of light pollution, making it suitable for use in urban environments.
• Narrowband Imaging: Works seamlessly with other narrowband filters like H-Alpha and OIII for comprehensive SHO (Hubble Palette) imaging.
• Wide-Field Astrophotography: Enhances contrast and detail in wide-field images when used with CCD cameras.

Benefits of Using the Optolong SII Narrowband 6.5nm Filter

Using the Optolong SII Narrowband 6.5nm Filter offers numerous benefits:

• Enhanced Image Quality: Achieve high-contrast, detailed images of sulfur-rich nebulae and other celestial objects.
• Effective Light Pollution Reduction: Blocks out artificial light pollution, improving image clarity and detail.
• Versatile Compatibility: Compatible with a range of imaging setups, including DSLR cameras, color/MONO CMOS, and CCD cameras.
• Durable Construction: Made from high-quality materials, ensuring long-lasting performance and resistance to environmental factors.

What is the Optolong SII Narrowband 6.5nm Filter Used For?

The Optolong SII Narrowband 6.5nm Filter is designed to enhance the visibility and detail of celestial objects by capturing specific wavelengths of light. This makes it ideal for:

• Deep-Sky Imaging: Capturing detailed images of sulfur-rich nebulae and other celestial objects.
• Light Pollution Reduction: Reducing the impact of light pollution for clearer and more detailed images.
• Astrophotography: Providing high-quality images with DSLR, color/MONO CMOS, and CCD cameras.
• Specific Wavelength Isolation: Optimizing imaging for the SII emission line.

Usage Instructions for the Optolong SII Narrowband 6.5nm Filter

Using the Optolong SII Narrowband 6.5nm Filter is straightforward:

1. Attach the Filter: Secure the filter to the appropriate eyepiece or camera adapter of your telescope.
2. Adjust Focus: Adjust your telescope’s focus to achieve a clear view of your target object.
3. Capture Images: Begin your astrophotography session, leveraging the filter’s capabilities to enhance clarity and reduce light pollution.
4. Store Safely: After use, store the filter in its protective case to prevent damage.

Tips for Getting the Best Results with the Optolong SII Narrowband 6.5nm Filter

To maximize the performance of your Optolong SII Narrowband 6.5nm Filter:

• Use in Clear Skies: For optimal results, use the filter under clear and dark skies.
• Combine with Other Filters: Consider using other narrowband filters to capture different wavelengths of light from celestial objects.
• Regular Maintenance: Clean your filters and telescope lenses regularly to ensure the highest image quality.
• Experiment with Different Objects: Try imaging various celestial objects to fully appreciate the benefits of the SII filter.

FAQ: Common Questions About the Optolong SII Narrowband 6.5nm Filter

Q: Can I use the Optolong SII Narrowband 6.5nm Filter with any telescope? A: The filter is optimized for use with various telescopes that accommodate 2" or 1.25" eyepieces or camera adapters.

Q: Does the filter effectively reduce light pollution? A: Yes, the filter is designed to block unwanted wavelengths of light, significantly reducing the impact of light pollution and enhancing image clarity.

Q: Is the filter suitable for both visual observation and astrophotography? A: The filter is primarily designed for astrophotography, providing high performance with DSLR, color/MONO CMOS, and CCD cameras.

Q: Can I use this filter for sun observation? A: The filter is not intended for direct solar observation. Always use appropriate solar filters and safety precautions when observing the Sun.

Q: How should I clean and store the filter? A: Clean the filter gently with a soft, lint-free cloth and store it in its protective plastic case when not in use to prevent damage.

Why Should You Buy the Optolong SII Narrowband 6.5nm Filter?

The Optolong SII Narrowband 6.5nm Filter is an essential tool for astrophotographers and astronomers who want to capture stunning images of the night sky. Its ability to capture specific wavelengths of light and reduce the impact of light pollution makes it invaluable for achieving detailed and high-contrast images of nebulae and other celestial objects. With its high-quality construction and advanced features, this filter will significantly improve your stargazing and imaging experience.

Popular Targets with the Optolong SII Narrowband 6.5nm Filter

Using the Optolong SII Narrowband 6.5nm Filter, you can capture stunning images of the following popular deep-sky targets:

• The Veil Nebula: A supernova remnant known for its intricate filamentary structure.
• The Helix Nebula: A planetary nebula often referred to as the "Eye of God" due to its appearance.
• The Dumbbell Nebula: A prominent planetary nebula with a distinctive hourglass shape.
• The Crescent Nebula: A bright emission nebula with a characteristic crescent shape.
• The Rosette Nebula: A large, circular emission nebula with a beautiful rosette pattern.

Specifications of the Optolong SII Narrowband 6.5nm Filter

• Filter Size: Available in 2 inches and 1.25 inches
• Bandwidth: 6.5nm centered at 672nm
• Center Wavelength: 672nm (SII)
• Transmission: 80% at the 672nm SII line
• Optical Quality: Multi-layer anti-reflection coating, non-cementing optical substrate coating
• Material: Germany Schott optical glass
• Thickness: 2.0mm
• Blocking Range: 300-1000nm, with OD4 blocking
• Surface Quality: 60/40 according to MIL-O-13830
• Surface Parallelism: 1/4λ, <30 parallelism over both surfaces
• Thread: Standard M48x0.75mm for 2-inch filters and M28.5x0.6mm for 1.25-inch filters

Package Content

When you purchase the Optolong SII Narrowband 6.5nm Filter, you will receive:

• 1 x Optolong SII Narrowband 6.5nm Filter (2" or 1.25"): The main component, designed to improve your astronomical observations.
• 1 x Protective Plastic Storage Case: Made from durable PP material to protect your filter when not in use.

Order Now

The Optolong SII Narrowband 6.5nm Filter is a powerful tool for any astronomer or astrophotographer looking to capture high-contrast, detailed images of the night sky. With its advanced coating technology, high transmission rates, and durable construction, this filter ensures that you can achieve stunning results in a variety of imaging scenarios. Whether you’re observing from a suburban backyard or a light-polluted urban environment, the SII filter will help you see the universe in greater detail than ever before. 

Transform your astronomical observations and astrophotography with the Optolong SII Narrowband 6.5nm Filter. Order now to enjoy clear, high-contrast images of nebulae and other celestial objects, capturing the beauty of the universe in unprecedented detail. Click the link below to add this essential tool to your collection today.