Choice of objective lenses depends on individual application requirements, but also user preferences. When viewing or inspecting objects, it is advantageous to see more of the sample (i.e. larger field of view), with more of the sample in focus (i.e. larger depth of focus). So typically, Mantis users might inspect at 4x, or 6x magnification. For detail work (e.g. electronics rework/soldering etc.), higher magnifications is typically preferred, dependent of application requirements. Users typically inspect at 4x, or 6x magnification, then perform detail work at 8x, or 10x.