With Olympus's 7-megapixel models, the SP-320 and the SP-310, the company caters to that snapshooter who wants a camera with more manual options than are offered by entry-level point-and-shoot models. The only difference between the two is the digital image stabilization available on the Olympus SP-320. That mode simply uses a higher ISO sensitivity setting in order to use a faster shutter speed; given the pair's poor high-ISO photo quality, you might as well opt for the Olympus SP-310 and save about $20. Furthermore, pitted against similarly priced models such as the Canon PowerShot A700 or the Fujifilm FinePix F30, both of which deliver better performance and photo quality, the good-but-not-great pair from Olympus don't fare terribly well.
Weighing just more than eight ounces with two AA batteries and an xD-Picture card installed, the Olympus SP-310/320 is too bulky to call a pocket camera, but it doesn't take up much room in a purse, and it'll ride just fine holstered to your belt in an optional carrying case. The 3X, 38mm-to-114mm zoom lens retracts when the power is turned off. Around back you'll find a sharp, 2.5-inch LCD for framing your shots and viewing them once they've been taken. If you want to conserve battery life--no rechargeables are included, though the camera will accept them--or find the LCD washing out in bright sunlight, you can frame your shot with the small optical viewfinder. Having that option is always a plus.
The camera feels well balanced, and most of the controls are within easy reach of your thumb. A protruding grip lets you hold the camera steady with a single hand. The layout--with the mode dial on the top of the camera, as well as the menu systems and various button placements--will seem familiar to those who've previously owned an Olympus camera, but unless you shoot entirely in automatic mode, you'll have to poke around through the menus and consult the manual to find all the manual features and settings. On the upside, Olympus's excellent built-in help system actually tells you what a particular setting is for and how each of the options differs.
Although their specs and feature sets are pretty typical for its class, we were surprised to find that both the Olympus SP-310 and the Olympus SP-320 support uncompressed raw files--the unprocessed data directly off camera's sensor--for the best, most easily manipulated photo quality. Raw files are very large--20MB each--but you'll need to buy a high-capacity xD card to supplement the camera's 25MB of built-in memory anyway. In addition to its 25 scene modes, the SP-310/320 provides full auto, semimanual aperture- or shutter-priority, or completely manual shooting. You can choose from three different autofocus settings--completely auto, center-frame, and user-selectable area--plus a manual focus mode with a helpful magnifying reticule to assist in focusing through the LCD screen. Lastly, it offers the de rigueur 30fps VGA movie capture up to card capacity.