Abstract: A microscope includes an illumination device having a light source and two current control devices. Each of the current control devices has a target value input and a measuring resistor arrangement. The current control devices supply a through-current for the light source and control a level thereof by way of a potential difference across the measuring resistor arrangement on the basis of a signal provided at the target value input. An adjustment device is configured to set two different illumination types of the microscope. The adjustment device and the illumination device are operatively connected to each other such that setting a first illumination type switches the illumination device into a first current configuration, in which at least one current control device supplies no through-current, and setting a second illumination type switches the illumination device into a second current configuration, in which at least one control devices supplies a through-current.