Nebula Filter S-II 1.25-inch 6.5nm

See Faint Nebulae Clearly, Even in Light-Polluted Skies

Struggling to observe deep-sky objects through city lights? The Explore Scientific S-II Filter reveals faint nebulae with enhanced contrast, without upgrading your telescope.

Features

• 6.5nm Passband Bandwidth: Specially designed to isolate the ionized sulfur (S-II) emission line at 672nm, allowing you to observe faint nebulae and deep-sky objects with enhanced clarity.
• Blocks Artificial Light: Effectively absorbs most artificial light, including streetlights and other common light pollution sources, for clearer, high-contrast views in urban and suburban environments.
• Optimized for 1.25-Inch Eyepieces: Perfect for smaller telescopes with 1.25-inch eyepieces, making it an accessible, high-performance tool for beginner to intermediate astronomers and astrophotographers.
• Improved Contrast and Detail: Dramatically increases the contrast and detail in faint planetary nebulae, emission nebulae, and supernova remnants, revealing celestial objects that are often invisible without a filter.
• Premium Quality with Individual Test Report: Each filter comes with an individual test report, ensuring top-tier quality and performance, so you can trust that you're receiving a precision-tested product.
• Astrophotography Friendly: Ideal for astrophotographers looking to enhance deep-sky imaging by reducing light pollution, delivering sharper and clearer images of nebulae from light-polluted skies.

The Explore Scientific S-II 1.25-Inch Nebula Filter is for you if…

• You’re struggling to observe faint nebulae or deep-sky objects due to light pollution in your city or suburb.
• You use a telescope with a 1.25-inch eyepiece and need a high-quality, compatible filter to improve your stargazing experience.
• You’re a beginner or intermediate astrophotographer who wants to capture clearer, more detailed images of nebulae, even in light-polluted areas.
• You want a filter that significantly enhances contrast and detail without needing to upgrade your telescope or travel to dark-sky locations.
• You seek a reliable, premium filter that comes with an individual test report, ensuring it meets professional standards for both visual observation and astrophotography.

If you're an urban or suburban astronomer struggling to observe faint nebulae, planetary nebulae, and supernova remnants, the Explore Scientific S-II 1.25-inch Nebula Filter is your ideal solution. Light pollution from streetlights and artificial sources makes it nearly impossible to see the delicate structures of these deep-sky objects. This filter is specially designed to block nearly all artificial light and isolate the specific ionized sulfur (S-II) emission line at 672nm, making faint nebulae visible with stunning clarity. Instead of just glimpsing a faint glow, you’ll be able to see the intricate details of objects like the Crab Nebula or the Helix Nebula.

Tailored for telescopes with 1.25-inch eyepieces, this filter is perfect for beginner to intermediate astronomers who use standard-sized equipment and don’t want to invest in larger, more expensive setups. The 6.5nm passband bandwidth precisely isolates the emission from ionized sulfur while filtering out the surrounding light. This allows you to observe deep-sky objects that are normally invisible under light-polluted conditions, providing a noticeable boost in contrast and detail. Whether you're observing from your backyard, a suburban rooftop, or a balcony, the Explore Scientific S-II filter helps you experience the cosmos without the need for dark-sky locations.

For astrophotographers, the benefits of the Explore Scientific S-II Filter are clear. By reducing unwanted light pollution, it dramatically enhances your ability to capture sharp, detailed images of emission nebulae. Picture photographing the Veil Nebula or the Eagle Nebula from a suburban setting and getting crisp, high-contrast results, without the typical haze and interference from city lights. The narrow 6.5nm passband enables you to isolate ionized sulfur emissions, making your long-exposure shots stand out with greater clarity and structure.

Plus, each filter is individually tested and comes with a test report, ensuring that you're receiving a premium product that meets rigorous quality standards. You’ll know that your filter is optimized for the best possible performance. If you’re ready to take your deep-sky observation or astrophotography to the next level, the Explore Scientific S-II 1.25-inch Nebula Filter is an essential tool for cutting through light pollution and revealing the hidden beauty of the universe. Don't let city lights hold you back—start seeing what you've been missing.