Ricoh GR DIGITAL IV
Ricoh has introduced a Hybrid AF System and an Image-sensor-shift Image Stabilization Function, which makes use of Ricoh's independently developed external AF sensor, and a 3-inch, approximately 1.23 million-dot VGA LCD monitor for heightened outdoor visibility. The addition of an electronic level that can detect inclination in the tilt direction, as well as the conventional horizontal direction also improves operability. Moreover, the inclusion of Dynamic Range Compensation makes it possible to shoot subjects in backlit or high-contrast scenes in the way the eye sees them, and Interval Composite, which can combine images shot at a certain shooting interval, advances the camera's expressive capabilities.
The camera comes newly equipped with Ricoh's independently developed external AF sensor, which has a maximum of 190 AF points. Through the Hybrid AF System, which is used in parallel with the conventional CCD contrast AF, Ricoh has realized an AF focusing time as short as 0.2 seconds, as much as half that of the GR DIGITAL III.
Also, algorithm refinements have led to improvements in the AF speed for macro shots that are taken using only the CCD contrast AF method for a maximum reduction of half the time of the previous model.
In 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 by performing the metering with only the external AF sensor. The metering information from the external AF sensor can be displayed on the LCD monitor as necessary.
Through refinements to the optical filter and optimization of the image processing from the previous model, the GR DIGITAL III, the SFR characteristics have been improved. With the new image processing engine, the GR ENGINE IV, color reproduction enhancement and color noise reductions are achieved when taking high-sensitivity photographs. Ricoh's signature 28mm/F1.9 GR lens demonstrates its high resolution while suppressing chromatic aberration and distortion. The approximately 10 million-pixel, 1/1.7-inch CCD shows off its high-sensitivity characteristics. These are the elements through which the GR DIGITAL IV achieves the highest image quality in GR DIGITAL history.
Note: Spatial Frequency Response (SFR): One of the indicators of a digital camera's resolution characteristics, including everything from the optical system to the image processing.
With the image-sensor shift image stabilization function, the GR DIGITAL IV achieves a stabilization effect equivalent to a shutter speed increase of a maximum of 3.2 stops*, which combined with the fast F1.9 GR lens further increases the camera's ability to capture dark scenes.
Through the introduction of the new 3-inch, approximately 1.23 million-dot VGA LCD monitor, which adds white pixels to the RGB ones, the GR DIGITAL IV secures a maximum brightness of approximately 1.7 times that of the GR DIGITAL III, improving its visibility when outdoors. A function in which the camera automatically adjusts the luminance to match the brightness of the subject has been added, which minimizes decreases in visibility due to changes in the shooting environment.
The system features dynamic range compensation to minimize the effects of blown highlights in bright areas and crushed blacks in dark ones. For backlit or high-contrast scenes where exposure compensation alone is not enough, compensation is performed for each area, enabling the photographer to take pictures at a brightness that closely matches how the subject looked. The Auto Bracket function has been enhanced. In addition to the conventional Exposure and White Balance, Contrast Bracket Setting and Dynamic Range Compensation bracketing have been newly added, of which any two can be selected for addition to the image settings to record a sequence of three shots with Image Setting Bracket.