Collection: Products

The Optolong H-Beta 25nm Filter 1.25" is an essential tool for anyone serious about astronomy and astrophotography. Its ability to isolate the H-Beta emission line and reduce light pollution makes it invaluable for capturing detailed images of faint nebulae. With its high-quality construction and advanced features, this filter will significantly improve your stargazing and imaging experience.

The filter offers 95% transmission at the bandpass, allowing maximum infrared light to pass through while blocking unwanted wavelengths. By blocking wavelengths below 670nm, the filter enhances contrast and surface detail, reducing the effects of seeing and atmospheric distortion.

Reducing atmospheric distortions and enhancing surface detail and contrast for planets like Jupiter, Saturn, and Mars. Lunar Imaging: Providing sharper and more detailed views of the Moon’s surface. Enhancing the quality and detail of IR-LRGB images by blocking unwanted wavelengths and allowing only IR light to pass.

The filter is primarily designed for imaging with color cameras. While it can be used for visual observation, its main benefits are realized in astrophotography.

Investing in the Optolong L-Enhance Tri-Band Filter 2" means achieving professional-grade astrophotography results. Its superior construction, light pollution suppression capabilities, and compatibility with a wide range of equipment make it an invaluable tool for capturing the beauty of the night sky in vivid detail.

Achieve high-contrast, detailed images of nebulae and other celestial objects by isolating specific wavelengths of light. Effectively blocks unwanted wavelengths, significantly reducing the impact of light pollution and improving image clarity.

The Optolong L-Extreme Dual-Band Filter is primarily used for capturing and enhancing images of deep-sky objects such as nebulae. By isolating the H-alpha and OIII emission lines, it enables astrophotographers to obtain clearer and more detailed images, even in light-polluted environments.

Whether you're using a RASA, HyperStar, or other fast focal ratio telescope, the Optolong L-eXtreme F2 Fast Filter will help you achieve clear, detailed images of the deep sky with unparalleled efficiency.

The Optolong L-Extreme Light Pollution Filter 1.25" 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.

Unlike traditional light pollution filters, the Optolong L-Pro Filter features a multi-bandpass design that minimizes its impact on color rendition. This makes it ideal for photographing continuum sources such as galaxies and globular clusters without compromising color accuracy.

The Optolong L-Pro Light Pollution Filter is crafted with a robust aviation-grade aluminum frame and features a sophisticated multi-bandpass filtering technology. It is designed to significantly reduce wavelengths from common light pollutants while ensuring high transmission rates at critical nebula emission lines, such as OIII, H-beta, NII, H-alpha, and SII. The filter's double-sided polishing process and precision optical coatings improve image quality and clarity.

Achieves very high transmission (~90%) at major nebula emission lines, including OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm), and SII (672nm).

The Optolong L-Quad Enhance Filter is primarily used for capturing and enhancing images of deep-sky objects such as nebulae, galaxies, and star clusters. By isolating key emission lines and reducing light pollution, it enables astrophotographers to obtain clearer and more detailed images, even in urban and suburban environments.

The filter isolates H-Alpha (656nm) and OIII (500.7nm) emission lines, blocking out other wavelengths and significantly reducing light pollution. Features a 3nm bandwidth for both H-Alpha and OIII, ensuring high contrast and detailed images.

The Optolong LRGB 2 Inch Filter Set Kit is an essential tool for anyone serious about astrophotography. Its ability to separate the light spectrum into primary components and block unwanted wavelengths makes it invaluable for capturing high-contrast, detailed images of the night sky. Whether you’re focusing on deep-sky objects or planetary details, this filter set ensures superior performance and image quality.

The gap between the green and red filters blocks the primary Sodium (Na) light pollution line at 589nm, enhancing color balance and separation. These filters also block infrared wavelengths (700-1100nm), eliminating the need for a separate IR cut-off filter.

The filter effectively blocks skyglow at 589nm and various street light emissions, preserving image brightness and increasing contrast. The filter cell is CNC machined for high precision, ensuring a perfect fit and alignment with your telescope’s eyepiece.

The Optolong Moon and Skyglow Filter 2" is designed to improve the visibility of celestial objects by reducing the transmission of light pollutants. This filter blocks unwanted light from skyglow and streetlights, darkening the background sky and enhancing the contrast of the Moon, galaxies, nebulae, and globular star clusters. It is particularly effective for both visual observation and astrophotography, making it an essential tool for any astronomer.

The Optolong ND Filter 2" (ND3) is an essential accessory for astronomers and astrophotographers who need to manage brightness without altering the color balance of their observations. This neutral density filter is designed to uniformly reduce the intensity of all wavelengths of light, preserving the true color of celestial objects.

The filter has an ND-3.0 rating, offering a 1,000 reduction factor and a transmission of 0.1%, significantly reducing the brightness of celestial objects. The filter uniformly transmits all wavelengths of light, retaining the true color of the observed object.

Optimized for specific wavelengths, it offers 90% transmission at 495.9 nm and 500.7 nm, critical for viewing ionized oxygen in nebular regions. The filter significantly cuts out unwanted light with only 0.1% transmission at certain wavelengths, further clarifying your celestial observations.

The Optolong OIII 6.5nm Filter 1.25" is a powerful tool for any astronomer or astrophotographer looking to reduce the effects of light pollution and improve the visibility of deep-sky objects. With high transmission rates, advanced coating technology, and durable construction, this filter ensures that you can capture stunning, high-contrast images of the night sky with ease.

Don’t miss the opportunity to elevate your stargazing and astrophotography to new heights. Order the Optolong OIII Filter 2 Inch 18nm today and start capturing the beauty of the night sky like never before. Click the link below to add this essential tool to your astronomical toolkit.

Astrophotography enthusiasts, meet your next essential tool: the Optolong OIII Narrowband 6.5nm Filter, available in both 2" and 1.25" sizes. This high-quality filter is designed to isolate the Oxygen III (OIII) emission line at 500nm, drastically reducing the impact of light pollution and enhancing the contrast and details of your deep-sky images.