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17 EUR
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price without VAT: 14 EUR
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M42 / M42 extension 21 mm long. This element allows to increase the working distance in the optical path, e.g. to achieve the required working distance (back focus). It can be used with ZWO cameras and accessories, e.g. in a set with an off-axis guider and filter wheel. For example: to obtain a distance of 55 mm from the ASI071 camera matrix, this extension should be used together with a 16.5 mm sleeve and a native distance of 17.5 mm (17.5 + 21 + 16.5 = 55 mm). • total height: 25 mm
• male thread length: 4.1 mm
• female thread depth: 5.7 mm
• Outer diameter: 50.5 mm
• weight: 48.5 g
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