BeamWatch® monitors YAG, fiber, and diode lasers (980–1,080 nm) and measures key beam size, position, and quality parameters. While 3D views of laser beam caustic and ellipticity enable quick and realistic initial display, beam measurements, charted over time, let users trace waist width and location during setup. Magnification optics dynamically measure beams with spot sizes down to 55 µm, allowing instant readings and accelerated correction of large area cosine changes.