The main differences are as follows: (1) The effective pixels has improved from 5 megapixels to 6 megapixels to achieve higher image quality. (2) Increased number of frames of sequenial recording with approx. 1.8 fps. (Increased internal memory capacity) (3) Selectable image size at progressive capture. (1.8 fps) (4) Movie recoeding is only available at 320 x 240 pixel size. (640 x 480 size is not available.) (5) 11languages supported. (Russian, Korean, Chinese (Traditional) added.) Also the following functions are employed as well as DiMAGE Z5. - Rapid AF - 2.0-inch LCD monitor - Silent zoom - Power saving design (approx. 240 frames with AA size Alkaline battery, approx. 420 frames with AA size NiMH batery (2500mAh)