Lumantek is a Seoul, South Korea-based electronics manufacturer that designs broadcast, live production, and test & measurement equipment. The company's product range spans video switchers, SDI and HDMI converters, distribution routers, HD encoders, stream analyzers, live titlers, and RF testing instruments, with a focus on the needs of Digital and Mobile TV, IPTV, and radio broadcasting.

The brand is best known in music and content-creation circles for its ez-series of compact video tools, including the ez-Pro VS4 and VS10 seamless HD video switchers used in streaming and live events, and the pocket-sized ez-SHV+ and ez-HSV+ SDI/HDMI converters with built-in LCD preview screens. Other lines include the ez-MD+ multi-converter and the WEIVER RF recording and analysis system. Products are distributed internationally through retailers such as Sweetwater, B&H, Adorama, and Markertek.