An electronic device may include an image sensor, a processor, and a memory. The image sensor may include at least one photo diode, a transfer gate connecting the at least one photo diode to a first node (FD1 node), a first capacitor connected to the first node and having first capacitance, a dynamic range gate (DRG) connected between the first node and a second node (FD2 node), a second capacitor connected to the second node and having second capacitance, and a micro controller unit. Other various embodiments identified through the specification are possible.