Imaging device capable of reducing power consumption

An imaging device in which a regular image for recording is taken upon an operation of a release button performed during a take of a through image, said regular image being stored in a storage medium, said imaging device comprising:

• a first focus adjuster for performing focus adjustment by driving a focus lens so as to maximize a focus evaluation value representing contrast of said through image;
• a mode selector for changing a focus adjustment mode between a continuous AF mode in which said focus adjustment is repeated during the take of said through image, and a single AF mode in which said focus adjustment is performed at a time when said release button has been operated during the take of said through image;
• a focal-length detector for detecting a focal length on the basis of a position of a zoom lens;
• a mode controller for changing said focus adjustment mode to said single AF mode when said focal length falls below a predetermined threshold value, said mode controller changing said focus adjustment mode to said continuous AF mode when said focal length exceeds said threshold value;
• and
• further comprising:
• a subject-distance measuring unit for measuring a subject distance of a subject prior to an operation of said first focus adjuster;
• a second focus adjuster for narrowing, on the basis of said subject distance, a movement range of the focus lens to be moved by said first focus adjuster;
• a judgment portion for judging whether the subject distance measured by said subject-distance measuring unit is proper or not;
• and
• a threshold-value changer for changing said threshold value so as to lower a ratio of selection of said continuous AF mode when it has been judged that said subject distance is proper.