Optolong L-Ultimate 2 / 1.25 Inch

Introducing the Optolong L-Ultimate 2"/1.25" Inch Dual Bandpass Light Pollution Reduction Imaging Filter — your key to capturing the cosmos with unparalleled clarity and contrast. Optimize your astrophotography experience with this cutting-edge filter designed for both 2" and 1.25" setups.

Optolong L-Ultimate 2"/1.25" Inch Dual Bandpass Filter: Unlock the Wonders of the Night Sky

The Optolong L-Ultimate 2"/1.25" Inch Dual Bandpass Filter is a 3nm dual band marvel engineered to combat light pollution and elevate your astrophotography game. With a focus on H-Alpha (red) and OIII (green-blue) emissions, this filter selectively isolates nebulae signals, delivering awe-inspiring images.

Key Features:

1. Advanced Dual-Band Technology: The L-Ultimate's dual 3nm bandwidth only passes through Ha and OIII emission lines, eliminating unwanted light pollution emission lines for a darker sky background and enhanced contrast.
2. Light Pollution Blocking: Say goodbye to the interference of artificial light from mercury vapor lamps, sodium vapor lights, and atmospheric oxygen emissions, ensuring pristine images in heavy light pollution areas.
3. Optimized Halo Performance: Unlike other dual-narrowband filters, the L-Ultimate boasts optimized halo performance, minimizing any unwanted halos when capturing bright star objects.
4. Versatile Compatibility: Suitable for use with DSLR, color/MONO CMOS, and CCD cameras, as well as telescopes with f-ratio f/4 or slower, providing flexibility in your astrophotography setup.
5. Premium Construction: Crafted with precision, the filter features optical glass substrate, 1.85mm thick B270 glass, and multi-layer anti-reflection coating for durability and scratch resistance.
6. Wide Blocking Range: With a blocking range of 300-1000nm (>OD4), the filter ensures effective elimination of unwanted wavelengths, letting you focus solely on capturing the beauty of H-Alpha and OIII emissions.
7. Stringent Quality Assurance: Each filter undergoes a rigorous testing process on a spectrophotometer and laser interferometer, guaranteeing high performance and reliability.

Why Choose Optolong L-Ultimate?

The L-Ultimate stands apart with its specialized design, offering astrophotographers:

• Darker Sky Background: Experience a darker sky background, enhancing the contrast between nebulae and the overall signal-to-noise ratio.
• Selective Light Filtering: Selectively filter light pollution and clutter signals through nebulae emission lines, avoiding the impact of light pollution on your astrophotography.
• Unmatched Contrast: Enjoy a more contrasted image with suppressed stars, thanks to the dual-3nm bandwidth filter.

Applications of the Optolong L-Ultimate Filter

The Optolong L-Ultimate Filter is specifically designed for astrophotographers seeking to isolate and capture the vibrant emissions from nebulae amidst heavily light-polluted skies. This filter excels in both urban and suburban environments, where light pollution can significantly impair celestial observations. Its dual bandpass design is ideal for imaging a variety of nebulae, enhancing the visibility of H-Alpha and OIII emissions, which are pivotal in astrophotography. It can be used with DSLR, color/MONO CMOS, and CCD cameras and is compatible with telescopes featuring an f-ratio of f/4 or slower.

Benefits of the Optolong L-Ultimate Filter

The Optolong L-Ultimate Filter offers several transformative benefits for astrophotographers:

• Superior Light Pollution Blocking: This filter effectively cuts through the clutter of artificial light from common urban lighting, such as mercury and sodium vapor lamps, ensuring that only the desired celestial wavelengths are captured.
• Enhanced Contrast: With its dual 3nm bandwidth, the filter provides a darker sky background, thus increasing the contrast for H-Alpha and OIII emissions. This makes it easier to distinguish fine details in nebulae against the cosmos.
• Optimized Halo Performance: The L-Ultimate is engineered to minimize halos around bright stars, a common issue with many dual-narrowband filters, thereby producing clearer and more precise images.
• Durability and Quality: Made with high-quality B270 glass and a multi-layer anti-reflection coating, the filter is built to last and resist scratches and other damage.

Usage of the Optolong L-Ultimate Filter

Integrating the Optolong L-Ultimate Filter into your astrophotography workflow is straightforward:

1. Installation: Fit the filter onto your telescope or camera setup. It comes in two sizes, 2" and 1.25", to match a wide variety of equipment.
2. Settings Adjustment: Adjust your camera or telescope settings to accommodate the specific transmission profiles of H-Alpha and OIII emissions. This might include tweaking exposure times and gain settings.
3. Target Selection: Choose your celestial targets that emit strongly in the H-Alpha and OIII wavelengths, such as emission nebulae, for optimal results.
4. Imaging Session: Conduct your imaging session, focusing on the stability of your setup and the weather conditions for the best possible captures.

Tips for Maximizing the Use of Your Optolong L-Ultimate Filter

• Align and Focus Carefully: Ensure your telescope is accurately aligned and focused, as the narrow bandwidth of the filter requires precise focusing to capture sharp images.
• Regular Cleaning: Maintain the cleanliness of the filter to avoid dust spots or smudges that could degrade your images. Use a proper optical cleaning kit.
• Monitor Weather Conditions: Ideal imaging conditions include clear, moonless nights for the best use of the filter's capabilities.

Q&A About the Optolong L-Ultimate Filter

Q: What types of telescopes is the L-Ultimate Filter compatible with? A: It is suitable for telescopes with an f-ratio of f/4 or slower, and fits any telescope that can accommodate 2" or 1.25" filters.

Q: Can the L-Ultimate Filter be used with any camera? A: Yes, it is versatile enough to be used with DSLR, color/MONO CMOS, and CCD cameras.

Q: How does the L-Ultimate Filter handle light pollution? A: It is designed to block out the most common wavelengths of light pollution while allowing the critical nebula emission lines to pass through, significantly improving image quality in polluted areas.

Popular Targets for the Optolong L-Ultimate Filter

The filter is particularly effective for imaging:

• The Orion Nebula (M42): Reveals intricate cloud structures and stellar formation.
• The Lagoon Nebula (M8): Enhances the visibility of hydrogen emissions and star clusters.
• The Veil Nebula: Offers detailed views of its delicate, lace-like remnants.
• The North America Nebula: Captures its complex ionized gas emissions and dark dust lanes.

Specifications of the Optolong L-Ultimate Filter

• Sizes Available: 2" and 1.25"
• Bandwidth: Dual 3nm for H-Alpha and OIII
• Blocking Range: 300-1000nm (>OD4)
• Substrate Material: High-quality B270 glass
• Thickness: 1.85mm
• Coating: Multi-layer anti-reflection

Package Content of the Optolong L-Ultimate Filter

• 1x Optolong L-Ultimate Filter
• Protective Storage Case: To ensure your filter remains protected when not in use.

Order Now

Ready to capture the cosmos with unprecedented clarity and contrast? Order the Optolong L-Ultimate 2" / 1.25" Inch Dual Bandpass Filter today and transform your astrophotography experience. Say goodbye to light pollution and hello to breathtaking celestial images. Don’t wait—start your journey to the stars now!