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Optolong OIII 18nm Filter 1.25"
he substrate of the filter is fine-optically polished to 1/4 wave and maintains less than 30 seconds of parallelism across both surfaces, ensuring supreme clarity and focus. Adhering to the stringent MIL-O-13830 standard, the filter boasts a 60/40 surface quality rating, guaranteeing minimal optical imperfections.Regular price $128.00 USDRegular priceUnit price per -
Optolong H-Beta 25nm Filter 1.25"
The Optolong H-Beta 25nm Filter 1.25" is an essential accessory for astronomers and astrophotographers who seek to capture the most elusive and faint nebulae in the night sky. Specifically designed to enhance the contrast of nebulae, this narrowband filter isolates the Hydrogen Beta (H-Beta) emission line at 486nm, significantly improving the visibility of nebulae such as the Horsehead Nebula and the California Nebula. With its advanced construction and high-quality materials, the Optolong H-Beta Filter ensures superior performance, making it an indispensable addition to your astronomical toolRegular price $140.00 USDRegular priceUnit price per -
ZWO H-Alpha Ha Narrowband Filter 1.25" 7nm
Ideal for capturing detailed images of emission nebulae, revealing structures and features that are often invisible with broadband filters. Essential for producing high-contrast, high-resolution images of celestial objects, even in light-polluted environments.Regular price $179.00 USDRegular priceUnit price per -
ZWO OIII Narrowband Filter 1.25" (7nm)
The ZWO OIII Narrowband Filter 1.25" (7nm) is a high-performance filter designed to significantly improve your astrophotography and visual observation of nebulae. This filter is tailored to allow a specific bandwidth of light centered on a wavelength of 500nm, which corresponds to the Oxygen III (OIII) emission lines.Regular price $179.00 USDRegular priceUnit price per -
ZWO SII Narrowband Filter 1.25" Inch (7nm)
The ZWO SII Narrowband Filter 1.25" Inch (7nm) is an essential tool for astrophotographers and visual observers seeking to capture the beauty of the night sky in high contrast and vivid detail. This filter is specifically designed to isolate the sulfur II (SII) emission lines at a wavelength of 672nm, allowing for clear and detailed imaging of nebulae, planetary nebulae, and supernova remnants.Regular price $179.00 USDRegular priceUnit price per -
Askar Duo-Band Narrowband Filter 2" / 1.25"
The Askar Duo-Band Narrowband Filter 2" / 1.25" is a revolutionary accessory for astrophotographers seeking to capture the intricate beauty of deep-sky objects. Designed with two passbands, this filter isolates the H-alpha and OIII emission lines, making it an excellent choice for imaging emission nebulae, planetary nebulae, and supernova remnants.Regular price From $189.00 USDRegular priceUnit price per -
Askar SII Narrowband (7nm) Filter 2" / 1.25" / 36mm / 31mm
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.Regular price From $199.00 USDRegular priceUnit price per -
Optolong SHO (SII H-Alpha OIII) Filters 2" / 1.25"
Each filter isolates a 6.5nm bandwidth centered at its respective emission line, ensuring high contrast and detailed images. SII and OIII filters offer 80% transmission at their designated wavelengths, while the H-Alpha filter provides over 85% transmission.Regular price From $205.00 USDRegular priceUnit price per -
Optolong H-Alpha 7nm Filter 2" / 1.25"
For astrophotography enthusiasts seeking to capture stunning, high-contrast images of deep-sky objects, the Optolong H-Alpha 7nm Filter in both 2" and 1.25" sizes is an indispensable tool. This narrowband filter is specifically designed to isolate the H-Alpha emission line at 656nm, effectively cutting through light pollution and enhancing the details and contrast of nebulae and other celestial objects.Regular price From $209.00 USDRegular priceUnit price per -
Optolong SII Narrowband 6.5nm Filter 2" / 1.25"
The Optolong SII Narrowband 6.5nm Filter is a high-performance astronomical filter designed to enhance deep-sky imaging. Available in both 2" and 1.25" sizes, this filter is specifically engineered to isolate the Sulfur II (SII) emission line at 672nm. By drastically reducing other transmissions, including those responsible for light pollution, this filter allows astrophotographers to capture stunning, high-contrast images of nebulae and other celestial objects.Regular price From $209.00 USDRegular priceUnit price per -
Optolong OIII Narrowband 6.5nm Filter 2" / 1.25"
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.Regular price From $209.00 USDRegular priceUnit price per -
Optolong OIII 6.5nm Filter 1.25"
The filter blocks infrared wavelengths from 700nm to 1100nm, eliminating the need for a separate IR-Cut filter. Precision Polishing: The filter substrate is fine-optically polished to 1/4 wave with less than 30 parallelism over both surfaces, ensuring superior image quality. Made from 2mm thick Schott B260 optical glass substrate, the filter offers excellent durability and reliability.Regular price $209.00 USDRegular priceUnit price per
