The GR DIGITAL IV features a new image engine and refined optical filter. In addition, to improve the quick shooting capabilities, Ricoh introduced a hybrid AF system and an image-sensor-shift image stabilization function. By shooting with a single press of the shutter-release button, the high focusing accuracy required for snapshot shooting has been added to the camera's quick shooting capabilities; metering is performed with only the external AF sensor. The metering information from the external AF sensor can be displayed on the LCD monitor as necessary.