Optolong CLS 2" Light Pollution Filter

Optolong CLS 2" Filter

Introducing the Optolong CLS 2" Light Pollution Filter

For astrophotographers and astronomers who often find themselves battling light pollution, the Optolong CLS 2" Light Pollution Filter is a game-changer. This filter is specifically designed to selectively reduce the transmission of light pollutants, such as those emitted by mercury vapor lamps, sodium vapor lights, and even unwanted natural light caused by skyglow. By doing so, it significantly improves the visibility of deep-sky objects, enhancing the contrast and detail in your observations and photographs. Whether you're using a color CCD camera or an unmodified DSLR, this filter is a must-have for clearer, more detailed views of the cosmos.

Features of the Optolong CLS 2" Filter

The Optolong CLS 2" Light Pollution Filter comes equipped with a range of features that make it an essential tool for any serious astronomer or astrophotographer:

• Multi-Layer Anti-Reflection Coating: Reduces internal reflections and increases light transmission for clearer images.
• Non-Cementing Optical Substrate Coating: Ensures durability and longevity of the filter.
• Electron-Beam Gun Evaporation with Ion-Assisted Deposition: Provides resistance to scratching and maintains stability on central wavelength (CWL) with no deviation due to temperature changes.
• Precision Coatings: Planetary rotation system ensures precision and homogeneity of coatings, guaranteeing high transmission of pass-band and optical density of off-band.
• Ultra-Thin Filter Cell: Minimizes vignetting and maximizes the possible clear aperture.
• High-Quality Construction: Made from aerometal material with precise CNC machining, sand blasting, and black anodized finish for extinction treatment to prevent reflections.
• Laser Engraving: Ensures that markings do not fade over time.
• High Transmission Rate: 95% transmission of main nebula emission lines (e.g., H-alpha 656nm, OIII 496nm & 500nm, SII 672nm, and H-beta 486nm).
• Effective Light Pollution Reduction: 0.1% transmission of off-band, specifically targeting the major emission lines of artificial light pollution (e.g., Na 589nm, Hg 435nm, and 578nm).

Applications of the Optolong CLS 2" Inch Filter

This filter is ideal for a variety of astronomical applications, particularly in environments with moderate to high light pollution:

• Deep-Sky Observation: Perfect for observing nebulae, galaxies, and star clusters by enhancing contrast and detail.
• Astrophotography: Essential for capturing detailed images of deep-sky objects with reduced light pollution interference.
• Urban Astronomy: Suitable for use in suburban and urban areas where light pollution is a significant issue.

Benefits of Using the Optolong CLS Light Pollution Filter 2"

Incorporating the Optolong CLS 2" Light Pollution Filter into your astronomical setup offers numerous benefits:

• Improved Visibility: Enhances the contrast and detail of deep-sky objects by selectively blocking light pollution.
• Versatile Use: Suitable for both visual observation and astrophotography, making it a valuable tool for all types of astronomical activities.
• Durable and Reliable: Constructed from high-quality materials and advanced manufacturing processes, ensuring long-lasting performance.
• User-Friendly: Easy to attach and use with standard 2-inch eyepieces and cameras.

What is the Optolong CLS 2" Light Pollution Filter Used For?

The Optolong CLS 2" Light Pollution Filter is designed to improve the visibility of deep-sky objects by selectively reducing the transmission of light pollutants. This filter enhances the contrast and detail of nebulae, galaxies, and star clusters, making them more visible even in areas with significant light pollution. It is particularly effective for astrophotography, allowing you to capture clearer, more detailed images of the night sky.

Usage Instructions for the Optolong 2" CLS Filter

Using the Optolong CLS 2" Light Pollution Filter is straightforward and efficient. Here’s a step-by-step guide:

1. Attach the Filter: Secure the filter to the 2-inch eyepiece or camera adapter of your telescope, using the standard M48x0.75mm thread.
2. Adjust Focus: Adjust your telescope’s focus to get a clear view of your target object.
3. Observe or Photograph: Begin your observation or astrophotography session, taking advantage of the enhanced clarity and contrast provided by the filter.
4. Store Safely: After use, store the filter in its protective case to prevent damage and contamination.

Tips for Getting the Best Results with the Optolong CLS 2" Light Pollution Filter

To maximize the performance of your Optolong CLS 2" Light Pollution Filter:

• Use in Optimal Conditions: For best results, use the filter under clear and dark skies.
• Combine with Other Filters: Consider using other narrowband filters for specific emission lines to capture different wavelengths of light from celestial objects.
• Regular Maintenance: Clean your filters and telescope lenses regularly to ensure the highest image quality.

Q&A: Common Questions About the Optolong CLS 2" Light Pollution Filter

Q: Can I use the Optolong CLS Filter with any telescope? A: Yes, the filter is compatible with any telescope that accommodates 2-inch eyepieces or camera adapters.

Q: Does the filter reduce light pollution effectively? A: Yes, the filter is designed to selectively reduce the transmission of light pollutants, significantly improving image contrast and clarity.

Q: Is the filter suitable for both visual observation and astrophotography? A: Absolutely, the filter is designed for both purposes, offering versatility and high performance for all astronomical activities.

Q: Can I use this filter for sun observation? A: No, the Optolong CLS filter is not designed for sun observation. Looking at the sun with this filter can cause blindness.

Why Should You Buy the Optolong CLS 2" Light Pollution Filter?

The Optolong CLS 2" Light Pollution Filter is an essential tool for anyone serious about astronomy and astrophotography. Its ability to selectively reduce light pollution and improve the visibility of deep-sky objects makes it invaluable for capturing detailed images of nebulae, galaxies, and star clusters. With its high-quality construction and advanced features, this filter will significantly enhance your stargazing and imaging experience.

Specifications of the Optolong CLS 2" Light Pollution Filter

• Filter Size: 2 inches
• Transmission: 95% at main nebula emission lines (H-alpha 656nm, OIII 496nm & 500nm, SII 672nm, H-beta 486nm)
• Blocking: 0.1% transmission of off-band (Na 589nm, Hg 435nm, and 578nm)
• Optical Quality: Multi-layer anti-reflection coating, non-cementing optical substrate coating
• Material: Optical glass lens, aluminum frame
• Surface Quality: High-quality aerometal material with CNC machining, sand blasting, and black anodized finish
• Thread: Standard M48x0.75mm
• Net Weight: 5.2g / 0.18oz

Package Content

When you purchase the Optolong CLS 2" Light Pollution Filter, you will receive:

• 1 x Optolong CLS 2" Light Pollution Filter: 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

Transform your astronomical observations and astrophotography with the Optolong CLS 2" Light Pollution Filter. Order now to enjoy clear, high-contrast images of the night sky and capture the beauty of deep-sky objects with unprecedented detail. Click the link below to add this essential tool to your collection today.