The Speedmaster L-858D is a top-of-the-line exposure meter that incorporates the latest features to support diversifying flash photography, and is equipped with incident light and reflected light methods (1° spot metering). This is the world's first exposure meter equipped with a radio wave mode that allows you to measure flash duration and HSS (high speed sync) exposure using a stand-alone exposure meter. Movie and video functions have also been expanded. Inheriting the reliability of the L-758 series, we have greatly improved operability and functionality.