Filters

Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond RGB imaging and capture your favorite nebulae in a totally new light, no matter how polluted your skies may be!

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1.25" LRGB Filter Set for Colour imaging with Monochrome Cameras.

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If you'd like to enhance your astronomy experience with some colour planetary filters, why not go for the saxon 2" Colour Planetary Filter Set?

This set comes with four filters of yellow, red, dark green and blue.

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Blocks infrared light from reaching the sensor of your CCD or CMOS camera

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Our 1-1/4" Light Pollution Reduction (LPR) Filters are designed to selectively reduce the transmission of certain wavelengths of light, specifically those produced by artificial light Learn More

• Take beautiful images of deep-sky objects from light-polluted suburban locations with the Rowe-Ackermann Schmidt Astrograph 11 (RASA 11) using this light pollution suppression filter
• Custom designed to replace the RASA’s optical window, so you still get optimum optical performance even with the addition of the filter
• Selectively blocks unwanted light pollution while providing over 90% transmission at critical wavelengths
• Maintains a more neutral color balance than other light pollution imaging filters, perfect for imaging colorful nebulae and galaxies
• Every filter is individually tested for light transmission. A graph of test results for your specific filter is included for your reference

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ZWO Duo-Band Filter Highlights

• Aerometal material with precise CNC machining
• Fine sandblasting process and anodized finish
• Extinction treatment to prevent reflection
• Laser engraving font that will never fade
• Precise double-sided optical coating
• Fine-optically polished to ensure accurate 1/4 wavefront and <30 seconds parallelism over the both surfaces

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