Abstract: In one embodiment, a mobile device system capable of viewfinder operation includes a memory device, a photosensitive device capable of receiving light providing an image of an external object, a video screen, and a processing device coupled at least indirectly to each of the memory and photosensitive devices and the screen, where the processing device provides signal(s) to the screen configured to cause the screen to operate as a viewfinder that displays a further image based upon the external object image. The mobile device further includes at least one sensing device either distinct from or associated with the screen, and configured to detect input commands indicated by movement or positioning of at least one object. The processing device causes the screen to display a plurality of options and subsequently to modify the further image displayed by the viewfinder in accordance with the detected commands. Related operational methods are also described.