The GR IV sports a fixed 28mm equivalent lens, which offers a maximum aperture of f/1.9 allowing for unprecedented low-light performance. This lens is made up of 8 elements in 6 groups with 3 special low-dispersion elements. These elements keep resolution and contrast high, while the 2 aspherical elements almost eliminate distortion completely. Finally the 7-blade diaphragm helps produce excellent Bokeh. This lens is mated to a large 1/1.7-inch CCD image sensor, with approx. 10.4 effective megapixels. This larger than average sensor (for a camera of this size) also helps the GR IV produces higher quality images.
The sensor at the top left of the image is the camera's external auto focus sensor which works with the standard contrast detection auto focus for faster results. This sensor is able to auto focus even when the shutter is not half-pressed, cutting the focus time in half from the GR DIGITAL III. They have also included new algorithms that allow this camera to focus faster in Macro mode than the GR DIGITAL III could normally.
With the cover ring removed, we can see the sensor for the 21mm wide conversion lens that is available for the GR DIGITAL III as well. The camera also works with the optional viewfinders and external flash as well.
Popping up out of the camera body if the this small flash unit. With a maximum range of around 10ft. (3m) you will not be able to light a large room, but it is a addition to the low-light performance.
On top of the camera you have the pop-up flash on the left, followed by the hot shoe for an external flash unit or optional view finder. On the right side are the power, shutter release selection dial and mode dial. The button directly above the mode dial locks it into place, so you do not have to worry about accidentally changing you shooting mode.
Framing and viewing your images is accomplished with Ricoh's high quality 3.0-inch, 1.2 million dot Transparent LCD screen. This screen allows you to see all of the fine details within your captured images. While shooting, the screen is very easy to see in all lighting conditions.
Controls on Back: At the top is the adjust lever. This allows you to choose or adjust a setting by pressing one direction or another. You can also select with it by pressing it straight into the camera. Pressing this in shooting mode brings up the camera's quick menu. To the right is a rocker bar that imitates the zoom control in playback mode. It allows you to zoom or enter index mode. Around the 4-way controller are the playback, self-timer and Disp. buttons. Finally the 4-way controller allows you to access the flash, macro mode and a pre-set function of your choice (Fn1). Inside the controller is the Menu/OK button. This takes you to the main camera menu.
On the right side of the camera are these two input/output ports. On top is a USB 2.0/AV port allowing you to hook up to a computer or standard definition TV. On the bottom is a mini HDMI port for viewing your images on a HDTV.
The GR DIGITAL IV uses SD/SDHC and Eye-Fi memory cards. The camera also includes about 40MB of internal memory, which will hold about 8-10 JEPG images. The camera is shown here with a SanDisk 4GB SDHC class 4 memory card.
Powering the GR DIGITAL IV is a 3.6V, 1250mAh rechargeable Li-Ion battery and portable quick charger. This battery provides an astounding 390 images on a single charge. Ricoh has also given this camera the ability to run on two standard alkaline AAA type batteries. This is a great feature if you should happen to run out of batteries, you can pick up replacements anywhere and cheap. This is only a backup though, as two standard alkaline AAA batteries will only provide approx. 30 images.