Optolong L-QEF Filter

Elevate your astrophotography experience with the Optolong L-QEF Filter, a revolutionary quad bandpass light pollution suppression filter designed for color cameras. Unleash the full potential of your celestial captures with this advanced filter that effectively eliminates unwanted light pollution, revealing enhanced contrast and intricate details of celestial bodies.

Key Features:

1. Light Pollution Suppression: The Optolong L-QEF Filter excels in cutting out light pollution from mercury and sodium lamps, producing breathtaking broadband images with minimal color cast.
2. Signal-to-Noise Ratio (SNR): Enjoy improved SNR, ensuring your astrophotographs display crystal-clear and detailed images.
3. Near Infrared Cut-Off: With a cut-off to 1000nm, the L-QEF reduces the impact of infrared noise, contributing to cleaner and more precise shots.
4. High Transmittance: Boasting more than 90% transmittance of nebula emission lines at H-Beta/OIII/H-Alpha/SII, and cut-off depths ranging from OD2 to OD4, the L-QEF significantly increases resistance to light pollution.
5. Versatile Applications: Ideal for both wide field astrophotography, capturing the beauty of the Milky Way in Summer and Winter, and deep-sky objects such as nebulae, galaxies, and star clusters.
6. Quad Bandpass Design: The quad bandpass design maximizes the color balance of nebulae, galaxies, and other broadband spectral targets, setting it apart as superior to other filters of the same type.

Spectrum and Characteristic:

• Substrate: Optical glass
• Thickness: 1.85mm
• Blocking Range: 300-1000nm
• Blocking Depth: OD2-OD4
• Surface Quality: 60/40
• Transmitted Wavefront RMS: λ/4
• Parallelism: 30s
• Diameter: 2 Inch

Coating Technology:

• Multi-Layers Anti-Reflection Coating: Enhances light transmission for optimal image quality.
• Non-Cementing Optical Substrate Coating: Ensures durability and resistance to scratching.
• Ion-Assisted Deposition Coating Technology: Precision coating for stability on CWL (central wavelength), unaffected by temperature changes.
• Planetary Rotation System: Offers precision and homogeneity of coatings ensuring a high value on the transmission of pass-band and Optical density of off-band.

Package Content

When you purchase the Optolong L-QEF Filter, you can expect the following contents in the package:

• Optolong L-QEF Filter: The main component, designed to fit standard 2-inch telescope or camera mounts.
• Protective Case: A sturdy protective case to store and transport the filter safely.

Optolong L QEF Chart:

• The horizontal axis represents Wavelength in Nanometers (nm).
• The vertical axis represents transmission in %.

Unlock the full potential of your astrophotography with the Optolong L QEF Filter. Save time during the shooting process and witness incredible results, revealing the celestial wonders in unprecedented detail. Capture the beauty of the night sky like never before with Optolong's superior filter technology.

Optolong L-QEF Filter: Your Ultimate Astrophotography Tool

The Optolong L-QEF Filter is a cutting-edge quad bandpass light pollution suppression filter specifically designed for color cameras. This advanced filter significantly improves the quality of your celestial images by eliminating unwanted light pollution and bringing out the fine details of astronomical objects. Whether you are an amateur astronomer or a professional astrophotographer, the Optolong L-QEF Filter is an essential tool to add to your equipment.

Benefits of Using the Optolong L-QEF Filter

The Optolong L-QEF Filter offers numerous benefits that can transform your astrophotography. Here are some key advantages:

Light Pollution Suppression: This filter is exceptional at cutting out light pollution from mercury and sodium lamps, resulting in stunning broadband images with minimal color distortion. By blocking out unwanted artificial lights, it allows for clearer and more detailed images of celestial objects.

Enhanced Signal-to-Noise Ratio (SNR): The filter improves the SNR of your images, ensuring that your astrophotographs are crystal-clear and packed with detail. Higher SNR means less noise and more signal, translating into more precise and sharp images.

Near-Infrared Cut-Off: With a cut-off at 1000nm, the L-QEF filter reduces the impact of infrared noise, leading to cleaner and more accurate shots. This feature is crucial for capturing high-quality images without the interference of infrared light.

High Transmittance: The filter boasts over 90% transmittance of nebula emission lines at H-Beta, OIII, H-Alpha, and SII. This high level of transmittance significantly increases resistance to light pollution, ensuring that your images are bright and vivid.

Versatile Applications: The Optolong L-QEF Filter is perfect for a wide range of astrophotography applications, from capturing the grandeur of the Milky Way to photographing deep-sky objects like nebulae, galaxies, and star clusters.

Quad Bandpass Design: The unique quad bandpass design maximizes the color balance of nebulae, galaxies, and other broadband spectral targets. This design sets it apart from other filters in its category, providing superior performance and image quality.

Usages of the Optolong L-QEF Filter

The Optolong L-QEF Filter is versatile and can be used in various astrophotography settings. Here are some of its primary uses:

Wide-Field Astrophotography: Capture the expansive beauty of the Milky Way and other wide-field astronomical objects with enhanced clarity and detail. The filter's ability to suppress light pollution makes it ideal for photographing large sections of the night sky.

Deep-Sky Objects: Photograph nebulae, galaxies, star clusters, and other deep-sky objects with unparalleled precision. The filter's high transmittance of nebula emission lines ensures that these objects are captured in their true colors and with maximum detail.

Urban Astrophotography: If you are photographing from a location with significant light pollution, the Optolong L-QEF Filter is indispensable. It effectively blocks out the interference from city lights, allowing you to capture clear and detailed images even in urban settings.

Tips for Using the Optolong L-QEF Filter

To get the most out of your Optolong L-QEF Filter, consider the following tips:

Proper Mounting: Ensure that the filter is securely mounted to your camera or telescope. A stable mount will prevent any movement or vibrations that could affect image quality.

Optimal Exposure Settings: Experiment with different exposure settings to find the best balance between light capture and noise reduction. The filter's high transmittance allows for shorter exposure times, which can help reduce noise.

Calibration Frames: Use calibration frames such as dark, flat, and bias frames to correct any imperfections in your images. These frames will help eliminate any residual noise and ensure that your final images are of the highest quality.

Stacking Software: Utilize astrophotography stacking software to combine multiple exposures into a single image. This process will enhance the detail and clarity of your photographs, making the most of the filter's capabilities.

Questions and Answers About the Optolong L-QEF Filter

Q: What is the Optolong L-QEF Filter used for? A: The Optolong L-QEF Filter is used for astrophotography to suppress light pollution and enhance the clarity and detail of celestial images. It is ideal for capturing wide-field views of the night sky as well as detailed images of deep-sky objects.

Q: Why should I buy the Optolong L-QEF Filter? A: You should buy the Optolong L-QEF Filter if you want to improve the quality of your astrophotographs by reducing the impact of light pollution, enhancing signal-to-noise ratio, and capturing more accurate and detailed images of celestial objects.

Q: What are the popular targets for this filter? A: Popular targets for the Optolong L-QEF Filter include wide-field views of the Milky Way, nebulae, galaxies, star clusters, and other deep-sky objects. It is especially effective in urban areas where light pollution is a significant issue.

Q: How does the quad bandpass design benefit my astrophotography? A: The quad bandpass design of the Optolong L-QEF Filter maximizes color balance and enhances the visibility of nebulae, galaxies, and other broadband spectral targets, providing superior performance compared to other filters.

Why Should You Buy the Optolong L-QEF Filter?

Investing in the Optolong L-QEF Filter is a wise decision for anyone serious about astrophotography. Here’s why:

Superior Image Quality: The filter's advanced technology ensures that your astrophotographs are of the highest quality, with minimal light pollution and maximum detail.

Versatility: Whether you are capturing wide-field images or focusing on deep-sky objects, the L-QEF filter is versatile enough to handle various astrophotography scenarios.

Durability: The high-quality construction and advanced coating technology ensure that the filter is durable and resistant to scratches, making it a long-lasting addition to your astrophotography toolkit.

Ease of Use: The filter is easy to install and use, making it accessible for both beginners and experienced astrophotographers.

Value for Money: Given its superior performance and durability, the Optolong L-QEF Filter offers excellent value for money, providing you with high-quality astrophotography results without breaking the bank.

Popular Targets for the Optolong L-QEF Filter

The Optolong L-QEF Filter is ideal for capturing a wide range of celestial objects. Some of the most popular targets include:

Milky Way: The filter’s ability to suppress light pollution makes it perfect for capturing the expansive beauty of the Milky Way.

Nebulae: The high transmittance of nebula emission lines ensures that you can capture the vibrant colors and intricate details of nebulae.

Galaxies: Photograph distant galaxies with enhanced clarity and reduced noise, bringing out the fine details of these fascinating celestial structures.

Star Clusters: The filter’s advanced design allows you to capture star clusters with stunning detail, highlighting the individual stars within these groups.

Optolong L-QEF Filter

The Optolong L-QEF Filter is a game-changer for astrophotographers looking to capture the night sky in all its glory. Its ability to suppress light pollution, enhance signal-to-noise ratio, and provide high transmittance of nebula emission lines makes it an essential tool for both amateur and professional astronomers. With its durable construction and advanced coating technology, the Optolong L-QEF Filter is built to last and deliver outstanding performance in various astrophotography applications. Whether you are photographing from an urban area or a dark sky site, this filter will help you achieve clearer, more detailed images of the cosmos. Order your Optolong L-QEF Filter today and take your astrophotography to the next level.