{"id":25224,"date":"2025-08-07T16:57:34","date_gmt":"2025-08-07T14:57:34","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=25224"},"modified":"2026-09-04T13:59:52","modified_gmt":"2026-09-04T11:59:52","slug":"omegon-pro-oiii-7nm-filter-125","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-pro-oiii-7nm-filter-125\/","title":{"rendered":"Omegon Pro OIII 7nm Filter 1.25 inch"},"content":{"rendered":"

Omegon Pro OIII 7nm Filter 1.25 inch: 7 nm bandpass for maximum nebula contrast<\/strong><\/h2>\n\n\n\n

This narrowband filter exclusively transmits the light of doubly ionized oxygen, with a bandwidth of just 7 nanometers. That sharp cutoff removes virtually all unwanted wavelengths: light pollution, moonlight, and broadband starlight.<\/p>\n\n\n\n

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Finer detail than a standard OIII<\/h4>\n\n\n\n

While a standard OIII filter passes a broader band, this 7 nm version cuts more tightly. Filaments, edges, and structures in objects such as the Veil Nebula, the Helix Nebula, and the Ring Nebula are therefore displayed with higher contrast.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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Visual and photographic<\/h4>\n\n\n\n

The filter is suitable for deep-sky observers operating under moderately to heavily polluted skies, and for astrophotographers capturing narrowband images with a monochrome camera. In the SHO palette, OIII, together with H-alpha and SII, forms the basis.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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Exposure and aperture<\/h4>\n\n\n\n

The smaller the aperture, the less light gets through. Count on a generous opening for visual use and longer exposure times for photography than with a broadband filter.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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

Combine with the Pro H-alpha 7nm and Pro SII 7nm for a complete narrowband set in the Hubble palette. A filter wheel makes switching between the three easy.<\/p>\n\n\n\n

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