PhotonicsTech has launched a line of compact infrared viewers for scientific and industrial applications. They are built around high-grade Gen-1 image intensifiers with an S-1 photocathode that extends their sensitivity to 1550 nm. The IRV-1350 model covers from 350 to 1350 nm and the IRV-1550, from 350 to 1550 nm. They can be attached to a TV camera or worn on the head harness for hands-free operation. Performance can be enhanced via an optional 3.63 magnifying lens or an IR illuminator. Field of view is 30°, and focus is from 4 in. to infinity.