Constantly changing object scenes require manual or automatic refocusing. The integrated permanent autofocus function makes this task easier. In the case of a change of scene, the camera automatically applies the optimum focus setting quickly and precisely. The completely innovative, very powerful autofocus system is laser-based and works extremely reliably. Even under unfavourable environmental conditions, such as poor lighting conditions, darkness or low thermal contrasts on the measuring object, this function provides exactly focused thermal images.