Logical developments were likely to affect the camera business. For example, digital image processing was reaching the stage where electronic still cameras were rapidly becoming both technically and economically feasible replacements for conventional cameras that relied on chemical film for image capture. Olympus was in the forefront of electronic still image capture and in 1990 had introduced its first electronic camera. The second part of the review sought to determine whether Olympus had developed any proprietary technology that could be used for competitive advantage. For instance, Olympus had developed an advanced electronic shutter unit that combined auto-focus control and lens system, which the size of the camera to be smaller this shutter unit allowed the firm to develop “small in size” as a distinctive feature of its cameras.