More from Amazon.com : http://www.amazon.com/gp/product/B0000XMXF2?tag=purrfectcatdi-20 <br /> <br />Orion 13031 Basic 1.25-Inch Rack-and-Pinion Telescope Focuser <br /> <br />Precision 125 focuser with a smooth adjusting rack-and-pinion design is ideal upgrade for a low-quality focuser or for home-built telescope projects <br />Universal fit base made of durable plastic to fit Newtonian reflector telescopes of 4 aperture and larger <br />Focuser accepts 125 telescope eyepieces <br />Has 1-1516 of focus travel with a fully racked-in height of 3-14 <br />Dual knurled focus knobs turn smoothly even with gloves on
