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| Electronics > Camera & Photo > Accessories > Telescope Accessories |
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| Product Description 3nm and has a very narrow full width at half-maximum (FWHM) bandpass of 7nm. It blocks out all other light, including artificial light pollution and moonlight.Designed exclusively for deep-sky imaging of emission nebulas with CCD cameras, this high-performance filter transmits 90 percent of light at the hydrogen-alpha line of 656. 1.25" Orion H-Alpha Extra-Narrowband Filter Shipping Weight: | ||||||||
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