Askar SII Narrowband (7nm) Filter 2" / 1.25" / 36mm / 31mm

Askar SII Filter 2" / 1.25" / 36mm / 31mm

Introducing the Askar SII Narrowband (7nm) Filter

The Askar SII Narrowband (7nm) Filter is an essential accessory for astrophotographers and astronomers who aim to capture the detailed beauty of SII (Sulfur II) emitting nebulae and supernova remnants. Available in sizes of 2", 1.25", 36mm, and 31mm, this filter isolates the SII emission line at 671.6nm, providing exceptional clarity and contrast. Whether you are imaging in light-polluted urban environments or under pristine dark skies, the Askar SII filter will enhance your astro-imaging capabilities, revealing the subtle details of the cosmos.

Features of the Askar SII Narrowband (7nm) Filter

The Askar SII Narrowband (7nm) Filter is packed with features that make it a top choice for serious astrophotographers:

• Precise 7nm Bandwidth: The filter allows only a 7nm bandwidth of light centered at 671.6nm, effectively blocking unwanted light pollution and night glow.
• High Transmission Rate: Achieves a transmission rate of up to 90% at the SII line, ensuring bright and clear images.
• Superior Optical Quality: Finely polished to maintain an accurate wavefront, ensuring minimal distortion and high-quality imaging.
• Out-of-Band Blocking: Rated at OD4 (0.01%) with a blocking range of 200-1050nm, providing excellent signal-to-noise ratio and reducing interference from other wavelengths.
• Durable Construction: Manufactured with high-quality materials and strict production control to ensure longevity and reliable performance.
• Versatile Compatibility: Available in multiple sizes (2", 1.25", 36mm, 31mm) to fit various telescopes and camera setups.

Applications of the Askar SII Narrowband Filter

The Askar SII Narrowband (7nm) Filter is ideal for various astrophotography applications:

• Deep-Sky Imaging: Perfect for capturing detailed images of SII emitting nebulae, planetary nebulae, and supernova remnants.
• Astrophotography in Light-Polluted Areas: Designed to mitigate the effects of light pollution, making it suitable for urban and suburban environments.
• Research and Observation: Useful for both amateur and professional astronomers conducting detailed studies of nebulae and other deep-sky objects.

Benefits of Using the Askar SII Narrowband (7nm) Filter

• Improved Image Clarity: Achieve higher contrast and more detailed images of SII emitting celestial objects.
• Reduced Light Pollution Impact: Effectively reduces the impact of artificial and natural light pollution, allowing for clearer observations and imaging.
• Enhanced Observational Quality: Isolates the SII emission line, providing deeper exploration of celestial phenomena.
• Reliable and Durable: Built with high-quality materials to ensure longevity and consistent performance.
• Versatile Use: Suitable for both visual observations (where applicable) and astrophotography, enhancing your astronomical toolkit.

What the Askar SII Narrowband (7nm) Filter is Used For

The Askar SII Narrowband (7nm) Filter is primarily used for capturing and observing SII emitting nebulae and supernova remnants. By isolating the SII emission line, this filter enables astronomers and astrophotographers to see and photograph structures within nebulae that are often obscured by other wavelengths of light. This makes it an invaluable tool for anyone conducting detailed studies of these celestial phenomena.

How to Use the Askar SII Filter

Using the Askar SII Narrowband (7nm) Filter is straightforward and effective:

1. Attach the Filter: Screw or insert the filter into the eyepiece or camera adapter of your telescope.
2. Align Your Telescope: Point your telescope at the SII emitting nebula or other celestial object you wish to observe or photograph.
3. Adjust Settings: For astrophotography, adjust your camera settings to account for the narrowband filter, ensuring proper exposure times.
4. Observe and Capture: Begin your observations or start capturing images. The filter will enhance the visibility of nebulae, providing clearer and more detailed views.

Tips for Using the Askar SII Narrowband (7nm) Filter

• Optimal Conditions: Use the filter in darker skies whenever possible for the best results.
• Stable Equipment: Ensure your telescope is on a stable mount to avoid vibrations that can affect image quality.
• Proper Care: Store the filter in a protective case to prevent scratches and damage when not in use.
• Experiment with Settings: Try different exposure times and ISO settings to find the optimal configuration for your specific setup and observing conditions.

Frequently Asked Questions (FAQ) About the Askar SII Narrowband (7nm) Filter

Q: Can this filter be used for planetary observation? A: No, the Askar SII Narrowband (7nm) Filter is specifically designed for nebula observation and astrophotography and is not suitable for planetary observation.

Q: Does the filter work well in heavily light-polluted areas? A: Yes, the filter is designed to significantly reduce the impact of light pollution, making it ideal for use in urban and suburban areas.

Q: What telescopes are compatible with this filter? A: The filter is compatible with any telescope that accepts 2", 1.25", 36mm, or 31mm filters, depending on the size you choose.

Q: Can I use this filter for visual observations? A: While primarily designed for astrophotography, this filter can also be used for visual observations of SII emitting nebulae, provided the telescope and observer are suitably equipped.

Q: How do I clean the filter? A: Clean the filter using a soft, lint-free cloth and an appropriate lens cleaning solution. Avoid harsh chemicals and abrasive materials.

Why Should You Buy the Askar SII Filter

Investing in the Askar SII Narrowband (7nm) Filter is a wise choice for any serious astronomer or astrophotographer. Its ability to isolate specific wavelengths of light and reduce the impact of light pollution makes it an essential tool for capturing stunning images of SII emitting nebulae and other deep-sky objects. The filter's high transmission rate and fine-optical polishing ensure superior performance, providing clear and detailed views of the night sky.

Popular Targets with the Askar SII (7nm) Filter

Using the Askar SII Narrowband (7nm) Filter, you can observe and photograph a variety of popular celestial objects:

• The Orion Nebula (M42): One of the most famous nebulae, offering stunning details and vibrant colors.
• The Helix Nebula (NGC 7293): Known for its eye-like appearance, this nebula reveals intricate structures with the filter.
• The Veil Nebula: A supernova remnant that shows delicate and complex filaments.
• The Lagoon Nebula (M8): A massive star-forming region that displays beautiful details with the SII filter.
• The Eagle Nebula (M16): Famous for the "Pillars of Creation," this nebula offers breathtaking views.
• The Dumbbell Nebula (M27): A planetary nebula that provides a spectacular sight with enhanced SII emission lines.
• The Ring Nebula (M57): Another planetary nebula that showcases the distinct ring structure when viewed with an SII filter.

Specifications of the Askar SII Narrowband Filter

• Name: Askar SII Narrowband (7nm) Filter
• Available Sizes: 2", 1.25", 36mm, 31mm
• Bandwidth: 7nm
• Wavelength: 671.6nm
• Transmission Rate: Up to 90% at the SII line
• Blocking Range: 200-1050nm, OD4 (0.01%)
• Material: High-quality optical glass
• Surface Quality: Finely polished to maintain accurate wavefront

Package Content of the Askar SII Filter

• Askar SII Narrowband (7nm) Filter
• Protective Case

Caution When Using the Askar SII Narrowband Filter

• Handle with Care: The filter is made of high-quality glass that can be damaged if dropped or mishandled.
• Avoid Direct Sunlight: Never use the filter to observe the sun or bright light sources, as this can damage your eyes and the filter.
• Proper Storage: Keep the filter in its protective case when not in use to prevent scratches and dust accumulation.

Important Note on the Askar SII Narrowband Filter

This filter is designed for observing and photographing nebulae and supernova remnants by isolating the SII emission lines. It is not suitable for general observation of the night sky or planetary observation without proper adjustments. For best results, use this filter with a telescope and camera setup that can accurately align the incoming light to be perpendicular to the filter.

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The Askar SII Narrowband (7nm) Filter is an essential tool for anyone serious about astronomical observation and astrophotography. Its ability to isolate specific wavelengths and reduce light pollution impact makes it invaluable for capturing stunning images of deep-sky objects. Don't miss the opportunity to add this high-quality filter to your astronomical toolkit.