OPTOLONG L-eXtreme 1.25" / 2" Dual-band Pass Filter

Introducing the OPTOLONG L-eXtreme Dual-band Pass Filter, available in both 1.25" and 2" sizes. This filter is designed to enhance the contrast of deep-sky objects, especially in light-polluted areas, by blocking out unwanted wavelengths of light. The L-eXtreme filter combines a narrowband H-alpha passband with a broadband light pollution suppression filter, providing dual-band imaging capabilities for astrophotography.

With a passband of 7nm, the H-alpha filter lets through only the desired wavelengths of light emitted by nebulae, while the light pollution suppression filter blocks out the artificial light and enhances the signal-to-noise ratio of the images. The result is stunning, high-contrast images of the night sky that showcase the intricate details of nebulae, galaxies, and other deep-sky objects.

Features of the Optolong L-eXtreme Dual Narrowband Filter

1. Dual-Band Pass Filter: The L-eXtreme combines a narrowband H-alpha passband with a broadband light pollution suppression filter, providing dual-band imaging capabilities ideal for astrophotography.
2. 7nm Bandpass: With a narrow 7nm bandpass, the filter allows only the desired wavelengths (H-alpha and Oxygen III) to pass through, blocking out other light sources and enhancing the signal-to-noise ratio.
3. High-Quality Optical Glass: Constructed from premium optical glass, ensuring clarity and sharpness in all your images.
4. Durable Metal Frame: The robust metal frame protects the filter and ensures longevity, even with frequent use.
5. Anti-Reflective Coatings: Multiple layers of anti-reflective coatings reduce glare and improve image contrast, resulting in clearer, crisper photos.
6. Precision Coating Technology: Utilizes ion-assisted deposition coating technology for durability, resistance to scratching, and stability against temperature changes.

Applications of the Optolong L-eXtreme Dual Narrowband Filter

• Deep Sky Imaging: Ideal for capturing detailed images of nebulae, galaxies, and star clusters by isolating the H-alpha and OIII emission lines.
• Urban Astrophotography: Perfect for use in light-polluted areas, enabling you to photograph the night sky without interference from artificial lights.
• Wide-Field Astrophotography: Suitable for capturing expansive views of the cosmos, including large nebulae and complex star fields.
• Scientific Research: Used by amateur astronomers for detailed and accurate scientific imaging of nebula emission lines.

Benefits of Using the Optolong L-eXtreme Dual Narrowband Filter

Investing in the Optolong L-eXtreme filter offers numerous benefits:

• Improved Contrast and Clarity: By blocking out unwanted light, the filter enhances the visibility and detail of deep-sky objects.
• Reduced Light Pollution: Effectively minimizes the impact of artificial lights, making it ideal for urban astrophotography.
• High Signal-to-Noise Ratio: The narrow 7nm bandpass ensures that only the desired wavelengths pass through, improving the quality of your images.
• Durability and Longevity: Built to last with high-quality materials and advanced coating technology, ensuring reliable performance over time.
• Ease of Use: Simple to install and compatible with a wide range of telescopes and cameras.

What is the Optolong L-eXtreme Dual Narrowband Filter Used For?

The primary use of the Optolong L-eXtreme filter is to:

• Capture High-Contrast Images: Isolate H-alpha and OIII emission lines to enhance the detail and contrast of nebulae and other deep-sky objects.
• Reduce Light Pollution: Block unwanted wavelengths from artificial light sources, improving the clarity and quality of astrophotography in light-polluted areas.
• Improve Astrophotography Results: Achieve stunning, high-quality images of the cosmos by minimizing interference and maximizing the signal-to-noise ratio.

Usage of the Optolong L-eXtreme Dual Narrowband Filter

Using the Optolong L-eXtreme filter involves a few straightforward steps:

1. Select the Appropriate Size: Choose between the 1.25" or 2" filter size that matches your telescope or camera.
2. Attach the Filter: Screw the filter onto your camera or telescope’s filter holder.
3. Adjust Camera Settings: Set your camera to the appropriate exposure time and ISO settings to account for the reduced light transmission.
4. Capture Images: Begin photographing the night sky, taking advantage of the filter’s ability to block unwanted light and isolate specific wavelengths.

Tips for Using the Optolong L-eXtreme Dual Narrowband Filter

To maximize the benefits of your Optolong L-eXtreme filter, consider the following tips:

• Check Compatibility: Ensure your camera or telescope is compatible with the filter size before purchasing.
• Use a Sturdy Tripod: For long-exposure astrophotography, use a stable tripod to keep your setup steady.
• Experiment with Settings: Try different exposure times and ISO settings to find the best configuration for your astrophotography.
• Clean Regularly: Keep the filter clean and free of dust and smudges to maintain optimal performance.
• Combine with Other Filters: For specific astrophotography needs, consider combining the L-eXtreme filter with other narrowband filters.

Frequently Asked Questions (FAQ)

Q: What sizes are available for the Optolong L-eXtreme filter? A: The filter is available in 1.25" and 2" sizes to fit a variety of telescopes and cameras.

Q: How does the filter improve image quality? A: The filter blocks unwanted wavelengths and isolates the H-alpha and OIII emission lines, reducing light pollution and enhancing contrast and clarity.

Q: Is the filter easy to install? A: Yes, the filter is designed for easy installation with standard screw-on attachment to your camera or telescope.

Q: Can the filter be used for visual observations? A: While primarily designed for astrophotography, the filter can also enhance visual observations of nebulae and other deep-sky objects.

Q: What is the thickness of the filter? A: The filter has a thickness of 1.85mm, ensuring minimal impact on the focal plane and image quality.

Why Should You Buy the Optolong L-eXtreme Dual Narrowband Filter

Investing in the Optolong L-eXtreme Dual Narrowband Filter is a wise choice for several reasons:

• Superior Astrophotography: Achieve stunning, high-contrast images of the night sky with enhanced clarity and detail.
• Versatile Compatibility: Available in both 1.25" and 2" sizes, making it suitable for a wide range of telescopes and cameras.
• Durable Construction: Built with high-quality materials and advanced coating technology for long-lasting performance.
• Reduced Light Pollution: Effectively blocks unwanted wavelengths from artificial lights, making it ideal for urban astrophotography.
• Ease of Use: Simple installation and user-friendly design make it accessible for all levels of astrophotographers.

Specifications of the Optolong L-eXtreme Dual Narrowband Filter

Here are the detailed specifications of the Optolong L-eXtreme Dual Narrowband Filter:

• Brand Name: Optolong
• Filter Sizes: 1.25" and 2"
• Bandpass: 7nm
• Wavelengths: H-alpha (656.3nm) and OIII (500.7nm)
• Thickness: 1.85mm
• Material: High-quality optical glass
• Frame: Durable metal
• Surface Quality: 60/40
• Blocking Range: 300-1000nm
• Blocking Depth: >99% for light pollution lines
• Transmitted Wavefront RMS: λ/4
• Parallelism: 30 seconds

Package Content

When you purchase the Optolong L-eXtreme Dual Narrowband Filter, you will receive:

• Optolong L-eXtreme Dual Narrowband Filter: The main filter unit in the size of your choice (1.25" or 2").
• Protective Case: A durable case to store and protect the filter when not in use.
• Instruction Manual: A manual to guide you through the installation and use of the filter.

Important Note

The Optolong L-eXtreme Dual Narrowband Filter is designed specifically for astrophotography. Ensure that your telescope or camera is compatible with the filter size you select. Regular cleaning and proper storage are essential to maintain the quality and performance of the filter.

Order Now

Don't let light pollution hinder your astrophotography pursuits. Order the Optolong L-eXtreme Dual Narrowband Filter today and take your celestial photography to the next level. With its superior design, ease of use, and compatibility with a wide range of telescopes and cameras, this filter is an essential tool for any serious astrophotographer. Capture the intricate details of the cosmos and bring the beauty of the universe to life. Upgrade your equipment now and unlock the full potential of your astrophotography endeavors.