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Extender-TOA 1.6x
For uses requiring more focal length, like planet or deep-sky short objects viewing and imaging, Extender-TOA makes it possible to lengthen the focal by 1.6x, from 1000mm (F/7.7) to 1600mm (F/12.3). Extender restores, at exit, a standard barrel of 50.8mm. It thus becomes possible to add other visual or photographic accessories to it (see the specific system-chart above).
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