Nebula Filter 2 O-III for Explorers

Explore Scientific offers a comprehensive range of high-quality nebula filters designed to enhance deep-sky observations. These filters are available in both 1.25-inch and 2.0-inch sizes, catering to the needs of amateur astronomers with various telescope setups.

The Nebula Filter CLS (1.25-inch and 2.0-inch) is a general-purpose light-pollution reduction filter that provides excellent contrast enhancement for a broad range of deep-sky objects, including nebulae and galaxies. With a transmission range of 436nm to 536nm and a peak at 488nm, this filter helps create a darker sky background, allowing for better visibility of faint celestial targets.

The Nebula Filter H-Beta (1.25-inch and 2.0-inch) is a specialized line filter that targets the hydrogen-beta emission line, the most abundant element in the universe. By selectively passing the 478nm to 496nm range with a peak at 489nm, this filter blocks out other wavelengths and effectively enhances the visibility of hydrogen-rich nebulae.

The Nebula Filter Oxygen III (1.25-inch and 2.0-inch) is the highest contrast filter in the series, designed to isolate the two emission lines of oxygen. With a range of 483nm to 511nm and a peak at 496nm, this filter is particularly useful for observing supernova remnants and other nebulae that glow in the oxygen-III spectrum, while reducing the visibility of objects that emit light across the entire visible spectrum.

The Nebula Filter UHC (1.25-inch and 2.0-inch) is an ultra-high contrast narrow-band filter, optimized for observing a broad range of nebulae. With a tighter bandpass compared to the CLS filter, it blocks even more light from artificial sources and airglow, further enhancing the contrast and visibility of these deep-sky wonders.

In addition to the nebula filters, Explore Scientific offers a Neutral Density Filter (1.25-inch and 2.0-inch) that transmits light uniformly across the entire visual spectrum. This filter is particularly useful for reducing glare and irradiation when observing the Moon with telescopes 4 inches (10.2 cm) or larger. It can also be employed in the splitting of close double stars where one of the binary pair significantly exceeds the other in brightness.

Explore Scientific is an optics company based in Springdale, Arkansas, dedicated to designing, building, and selling high-quality observation instruments and accessories for all skill levels. With a mission to make astronomy and other sciences more accessible, the company offers a wide range of products, from industry-leading waterproof eyepieces to telescopes, mounts, and a diverse selection of observing and imaging accessories.

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