ZWO M54M-M48F 0mm

M54M To M48F 0mm Ring Allow Connection Of M48 Male Threaded Device Like Focal Reducer, Flattener Or End Of Telescope Without Increasing Back-Focus. This Ideally Work For ZWO CAA Which Is Default M54 And Not All Telescope Support M54 By Default. ZWO Does Have M54M-M48F 2mm Adapter Which Increase Back Focus By 2mm Thus Making It Have Issue With Some Telescope Back Focus

Standard Thread Is M54x0.75 Male And M48x0.75 Female