The field of biological imaging is constantly evolving, driven forward by the increasingly complex and technologically sophisticated demands of the research community. As microscopy and other imaging techniques change, so too must the motion control systems that enable them. Photonics Online recently had the opportunity to talk with John Zemek, executive director of Applied Scientific Instrumentation. ASI manufactures sub-micron micropositioning hardware for laboratory and microscope automation and OEM systems. Zemek discusses the trends in biological imaging that are having the biggest influence on positioning system design, and what factors you should consider when evaluating such technology for your specific application.