WILLIAM OPTICS MINICAT 51 WIFD f/3.5 REFRACTOR COLOUR:RED 25" BA2961080 SKU 31 mm

25" BA2961080 SKU 31 mm BA2961081 SKU 36 mm BA2961082 SKU 2" BA2961083 SKU 50

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WILLIAM OPTICS MINICAT 51 WIFD f/3.5 REFRACTOR COLOUR:RED 25" BA2961080 SKU 31 mmThe William Optics Minicat 51 WIFD is an ultra fast f 3. 5 Petzval refractor for widefield imaging with a focal length of 178mm. Its 6 element optical design including two Super ED and lanthanum lenses controls chromatic aberration across a large image circle. The WIFD internal focusing design makes it simple to install autofocusers such as the ZWO EAF without the need for clumsy belt driven add ons. This design ensures precise and repeatable focusing