The disclosure relates to an electronic device (e.g., a camera) for improving image quality in a zoom scenario, and a control method thereof. The electronic device may display a preview image including an image generated from information acquired through the image sensor, perform a zoom-in operation or a zoom-out operation for the preview image, determine whether it is necessary to change an output mode of the image sensor in response to the zoom-in or the zoom-out operation, and generate an Inter-Integrated Circuit (I2C) instruction for changing the output mode of the sensor. Upon determining that it is necessary to change the output mode of the image sensor, control the sensor to change the output mode of the sensor by executing the generated I2C instruction while the image sensor maintains an active state, and change a sensor index recorded in a register to have access to information on a sensor mode.