ABSTRACT.I describe a simple new method for collimating a Cassegrain telescope that gives near-perfect correction over a wide field of view. This method was used to collimate the 6.5 m MMT in 2002 ...

HOTECH’s Advanced CT Laser Collimator uses a flat mirror at the eyepiece location, a target placed in front of the telescope, and three lasers to align your Schmidt-Cassegrain telescope. You can ...

While telescopes are designed to work outside, it sometimes takes some tender care to keep them working at their best. Over time, telescopes will pick up dust, and depending on how often they are ...

In a few days, a balloon-borne telescope sensitive to the polarization of high-energy “hard” X-rays will ascend to the edge of the atmosphere above Fort Sumner, N.M. Once aloft, the telescope will ...