{"id":33652,"date":"2025-11-14T11:44:09","date_gmt":"2025-11-14T10:44:09","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=33652"},"modified":"2026-09-10T14:45:34","modified_gmt":"2026-09-10T12:45:34","slug":"william-optics-ap-51-178-apochromatic-refractor-minicat-wifd-ota","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/william-optics-ap-51-178-apochromatische-refractor-minicat-wifd-ota\/","title":{"rendered":"William Optics AP 51\/178 Apochromatic refractor MiniCat WIFD OTA"},"content":{"rendered":"

The smallest cat: 178 mm focal length at f\/3.5<\/strong><\/h2>\n\n\n\n

The William Optics MiniCat 51\/178 WIFD<\/strong> is made for photographers who want to think big in a small format. With a focal length of 178 mm and an aperture of f\/3.5, you can capture large sky fields: complete constellations, the Milky Way, and vast nebulae, with short exposures and low noise.<\/p>\n\n\n\n

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Six-element optical system with internal focusing<\/h4>\n\n\n\n

The six-element lens design keeps stars round and tight even into the corners, without a separate flattener. The internal WIFD focuser does not move weight externally, so your balance remains stable and your camera rotates without sagging. The Bahtinov mask is integrated into the dew shield for quick and precise focusing.<\/p>\n<\/div>\n<\/div>\n\n\n\n

In the box<\/strong><\/h3>\n\n\n\n