{"id":92462,"date":"2026-01-05T16:10:36","date_gmt":"2026-01-05T15:10:36","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=92462"},"modified":"2026-10-13T11:15:01","modified_gmt":"2026-10-13T09:15:01","slug":"omegon-5mm-eyepiece-flatfield-ed-1-25-inch","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-5mm-oculair-flatfield-ed-1-25-inch\/","title":{"rendered":"Omegon Flatfield ED 5mm Eyepiece 60\u00b0 (1.25 inch)"},"content":{"rendered":"

Omegon Flatfield ED 5 mm Eyepiece 60\u00b0 (1.25 inch): flat field of view with ED glass for planets<\/strong><\/h2>\n\n\n\n

The Omegon Flatfield ED 5 mm is a planetary eyepiece with six lens elements, an ED element, and a flat 60-degree field of view. Details on the moon and planets remain sharp right to the edge, without the distortion that simple eyepieces show there.<\/p>\n\n\n\n

The large eyepiece provides a comfortable, natural view without black shadows, even when your eye is not exactly on the axis.<\/p>\n\n\n\n

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ED glass for pure colors<\/h4>\n\n\n\n

The ED lens element corrects color errors, so bright edges like the moon terminator stay sharp instead of bleeding purple. The multi-layer coating on all air-glass surfaces keeps the contrast high.<\/p>\n\n\n\n

Flat field of view of 60 degrees<\/h4>\n\n\n\n

With a 60-degree field of view, this eyepiece belongs to the wide-angle class: it offers about 20 percent more field of view than a Pl\u00f6ssl. Thanks to its field correction, the entire field is truly usable, right up to the edge.<\/p>\n\n\n\n

What can you see with a 5 mm lens?<\/h4>\n\n\n\n

On a 150\/750 Newtonian, 5 mm provides a magnification of 150x; on a telescope with a 1000 mm focal length, it provides a magnification of 200x. Saturn\u2019s rings, Jupiter\u2019s cloud bands, and fine lunar details are the obvious targets.<\/p>\n\n\n\n

Keep to the rule of thumb of a maximum of 2x the aperture in millimeters for a sharp image.<\/p>\n\n\n\n

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

The Flatfield ED series is also available in longer brand focal lengths for medium magnification and wide-field viewing. An Omegon Barlow lens further extends the range; a lunar filter is rarely needed with this short brand focal length.<\/p>\n\n\n\n

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