Din pacate aceasta descriere nu a fost tradusa momentan in limba romana, din aceasta cauza veti gasi in locul ei descrierea in limba engleza.
A 3" black-anodized (gold-anodized optional) aluminum "Extreme" focuser designed for use on large (10" to 16") Cassegrain Telescopes (NGF-XTc) with standard output threads and Newtonian Telescopes (NGF-XTn). A 2" Eyepiece Adapter is included. The Newtonian version includes a removable combination base (works on 10" radius up to a flat surface). The manual version of the NGF-XT lifts up to 8+ pounds and the motorized version up to 12 pounds. Manual "Nano Drive" control is approximately 13 times finer than most rack-and-pinion focusers.
