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Orion Telescopes
2" Orion Extra-Narrowband Oxygen-III Filter
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  • Astrophotographic 2" filter highlights blue/green Oxygen-III wavelength features of cloudy emission nebulas
  • Filter transmits 90% of light at 500.7nm wavelength (O-III)
  • High-quality filter for astrophotography with a full width half-maximum (FWHM) bandpass of 7nm or less
  • This narrowband filter essentially blocks all other wavelengths of light, including light pollution, so you can capture astrophotographs in less than ideal conditions
  • Metal filter cell threaded for use with 2" astrophotography accessories, including nosepieces of Orion CCD cameras and inside Filter Wheels

Learn more
Item #  05545

It's all about details. Orions 2" Extra-Narrowband Oxygen-III Filter is one of a set of three filters designed to bring you bright and beautiful images of emission nebulae in monochrome astrophotography. Using extra-narrowband filters is the latest technique for producing striking, high-contrast color CCD astrophotography of emission nebulae.

If you're using a monochrome CCD camera like Orion's Parsec 8300M, these specialized "line" filters are the perfect complement. Orion's 2" Oxygen-III Filter has a full-width half maximum (FWHM) bandpass of just 7nm, ensuring high-contrast images, even in heavily light-polluted or brightly moonlit skies. The filter can be used separately or in combination with a filter wheel for advanced tri-color imaging of emission nebulae.

Capture your favorite nebulae in high-contrast, even if you live in the city or light-polluted areas. Just add Orions 2" Extra-Narrowband Oxygen-III Filter to your camera bag and see the difference a blackened background sky creates. Includes a protective plastic case.


Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-676-1343.


Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

Product Support
Visit our product support section for instruction manuals and more

2" Extra-Narrowband Oxygen-III Filter
Plastic case

Orders received by 1pm Eastern Standard Time for in-stock item the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.


This product is available to ship Standard delivery within the 50 US states, APO/DPO/FPO addresses and US territories/protectorates. Delivery is not available to Canada.

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