Auto focus method and electronic device for performing the same

An electronic device, comprising:

• a first camera module;
• a second camera module configured to capture an image with a deeper depth of field (DoF) than the first camera module;
• and
• a processor connected to the first camera module and the second camera module,
• wherein the processor is configured to:
• select any one of the first camera module or the second camera module based on a blur level of an image obtained by the first camera module or the second camera module;
• move a lens set of the selected camera module such that the lens set focuses on the subject using an AF value obtained by the selected camera module;
• calculate a movement parameter of a lens set included in a camera module which is not selected, corresponding to a movement parameter of a lens set included in the selected camera module, as a result of evaluating reliability of the AF value of the image obtained from the selected camera module;
• and
• move the lens set included in the camera module which is not selected, depending on the calculated movement parameter.