Referring again to FIG. 5, the third images are acquired through the second camera 502 for the predetermined time 550, and may have a third attribute having a relatively higher resolution compared to the first images and/or a relatively wider field of view compared to the second images. The time points 540 at which the third images are acquired may be determined based on a user input related to the time point 510 at which photographing was started and/or at least one request signal 512 generated for the predetermined time 550. When the second camera 502 supports the AF function, the third images may be generated based on the request signal 512 generated based on focus information on an external object (e.g., a subject) for the predetermined time 550. When the second camera 502 does not support the AF function or is in a low-illuminance situation, the third images may be acquired in a third cycle based on at least one request signal 512 generated for the predetermined time 550. The third cycle may be relatively longer than the first cycle, and may be set to be the same as or different from the second cycle. When using the second capture method (e.g., a single image capture method), the processor may acquire one third image at each time point at which the request signal 512 is generated. The third image may also be acquired based on a first capture method (e.g., a multi-image capture method) at each time point at which the request signal 512 is generated. Because the third images are acquired through the second camera 502, the third images may include a captured image at a time point that is the same as or different from the time point at which the second images are acquired through the first camera 500.
