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You have until Feb 1, 2017 to return or exchange items purchased between Nov 1, 2016 and Jan 1, 2017. All other standard return policy conditions apply.
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The TDM Adapter from Explore Scientific is specifically designed to attach a Telescope Drive Master (TDM) onto Sky-Watcher HEQ5and Orion Sirus EQ-G equatorial mounts. The TDM is an electronic control system that dramatically reduces tracking errors that are intrinsic in equatorial drive gears, adding a higher level of accuracy without having to upgrade the entire mount.