Meade-engineered for smooth, rapid focusing of the image with any ETX model, the #1244 focuser includes coarse and microfine speeds. The standard-equipment hand controller accepts one (user-supplied) 9-volt battery and focuses the ETX-90 & ETX-105 telescopes (as well as the ETX-90 spotting scope).
On the ETX-90EC telescope, the focuser plugs into and is powered by the telescope's control panel, with operation executed through either the Electronic Controller or Autostar handboxes.