An imager comprising is provided having an image-capturing device, a display, and a view angle controller. The first in-focus detector is movable with respect to a stationary platform, and detects whether a subject image is in focus of an image sensor. The shake detector detects a shake transmitted to the first in-focus detector. The first driver repositions the first in-focus detector with respect to the stationary platform according to a shake detected by the shake detector. The first in-focus detector provided on an in-focus light path is different from a photographing light path on which light is directed to the image sensor, and detects whether a subject image is in focus using incoming light along the in-focus light path.