A system and method for providing television video conferencing using a remote computing device is disclosed. The worktable has a thermally conductive mount surface to place the target substrate thereon. Other dressings, systems, and methods are presented herein. 5where Rmin is the radius of curvature of the surface of the negative lens, adjacent to the positive lens, in the second lens unit and Rmax is the radius of curvature of the opposite surface thereof.