Astronomik - 6nm OIII MFR Narrowband Filter - 31mm Mounted in Low Profile Non-Threaded Cell

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Astronomik OIII Narrowband Filters are suitable for false color imaging of emission nebulae emanating doubly ionized oxygen (OIII). The contrast between an object glowing at 501 nm and the background is increased significantly due to the high transmission and effective out-of-band blocking!

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