Since 1978 Lumicon (USA) has built premium nebula filters-the original UHC and O?III narrowband lines-plus finder scopes and off-axis guiders, now revived under Farpoint Astro’s stewardship. Farpoint continues the legacy, offering filter refurbishment and verified transmission data.
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Yes, coatings are applied in California with individual spectral test data included.
The Lumicon UHC blocks mercury/sodium emissions yet keeps H-beta and O-III, enhancing nebula contrast.
Use dedicated optical cleaning fluid and a soft lens tissue; avoid alcohol on dielectric coatings.
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