{"id":92610,"date":"2026-01-06T15:42:37","date_gmt":"2026-01-06T14:42:37","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=92610"},"modified":"2026-07-19T22:18:41","modified_gmt":"2026-07-19T20:18:41","slug":"omegon-h-alpha-filters-pro-veil-3nm-2-inch","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-h-alpha-filters-pro-veil-3nm-2-inch\/","title":{"rendered":"Omegon Pro Veil H-Alpha Filter 3nm 2 inch"},"content":{"rendered":"

Omegon Pro Veil H-Alpha Filter 3nm 2 inch: the narrowest passband on hydrogen<\/strong><\/h2>\n\n\n\n

With a transmission of only 3 nanometers, this filter cuts even sharper than the 7 nm version. It blocks almost all disturbing artificial light and only lets through the red light from HII regions.<\/p>\n\n\n\n

Pro Veil is Omegon's narrow-band series for astrophotography. Each filter comes in a 2-inch aluminum mount with a sturdy protective case.<\/p>\n\n\n\n

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Where 3 nm makes a difference<\/h4>\n\n\n\n

The smaller the aperture, the lower the background signal in your recording. Under strong light pollution or moonlight, this results in visibly more contrast than a wider band. The background remains dark, even with long exposures.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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What the cost of electricity is<\/h4>\n\n\n\n

A narrower band also lets through less stray light. Expect longer exposure times per frame than with a 7 nm filter. This is manageable for fast optics, but with long focal ratios, the total session duration increases.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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Combine into a color image<\/h4>\n\n\n\n

In the SHO palette, H-alpha forms the red channel. If you choose the same bandwidth for all three channels, the exposure times will remain comparable to each other.<\/p>\n<\/div>\n<\/div>\n\n\n\n

Featured accessories<\/h3>\n\n\n\n

Combine with the Pro Veil OIII 3nm and Pro Veil SII 3nm for a consistent 3nm set in your 2-inch filter wheel.<\/p>\n\n\n\n

For whom yes and for whom no<\/h3>\n\n\n\n