Why You Can Trust CNET Sony Cyber-shot DSC-T70 review: Sony Cyber-shot DSC-T70
Sony Cyber-shot DSC-T70
Someone at Sony must really love touch screens. They're the interface of choice for the company's camcorders and in the last couple of years have been making inroads on the camera side of the business. All of the current T-series models have touch screens, though older models without touch screens are still available in some stores. The Cyber-shot DSC-T70 slaps a 3-inch touch screen on the back of a slim, stylish camera body that houses an 8.1-megapixel CCD imaging sensor and a 3x optical, 38mm-114mm f/3.5-f/4.3 Carl Zeiss Vario-Tessar zoom lens with optical image stabilization.
The Good
The Bad
The Bottom Line
When you've got such a small camera body, there's not a whole lot you can do with design, but Sony has managed to evolve the T-series design while keeping the line's sleek, elegant look. The T70 sports a much thinner sliding lens cover than the T50 did, though it still feels solid and, as in previous models, functions as an on/off switch, though that can be disabled in the menu if you don't want it to. The touch screen doesn't leave much room for hard buttons, and indeed, the only buttons on the camera are on the top; power and playback buttons sit to the left of the shutter, while a side-to-side zoom slider is on the right of the shutter button. Not only is this zoom slider downright tiny, but its placement makes it prone to accidental nudges that can ruin your framing just as you're about to press the shutter. Sony probably should have tried to fit a zoom rocker on the back, just above the right-hand corner of the screen, or at least put the slider to the left of the shutter to help prevent accidents, though I wouldn't want them to move the shutter button too far to the right, either.
The layout and overall organization of the touch-screen controls and menus aren't bad. Sony uses the corners to give you access to deeper menus, while icons along the sides let you change commonly used settings, such as exposure compensation, metering, focus, or sensitivity (aka ISO). I was a bit miffed to find that white balance is relegated to the shooting menu even though there is room for it on the right side of the screen. Despite its nice design, the touch screen doesn't make a very nice interface. The selections tend to be too small to use your finger on them, unless you have long, well-shaped fingernails (this camera's for you, fashionistas), though Sony does include a stylus that can clip onto the camera strap. If you do choose to clip that stylus on, and I highly suggest you do, you might want to tie off a little loop on the end of the strap, so it doesn't slide all over the place. Even with that stylus, the touch screen tended to be unresponsive. I had to press hard and repeatedly to get it to accept some of my commands, which quickly became frustrating. Also, you have to confirm that you want to access certain menu functions, which slows down the entire process. I assume that this is to prevent accidental changes to these settings, but back when I had physical buttons to press, this was never an issue.
Like most cameras these days, the DSC-T70 includes face detection. Sony's version can see as many as eight faces in the scene and uses them to determine focus and exposure. The Smile Shutter feature expands on face detection by first locating a face and then waiting for that face to smile before snapping a picture. To use the feature, you have to enter the Smile Shutter scene mode, then press the shutter button, point at a face and wait for it to smile, and the camera will take a picture. The camera will wait for the face to smile again and shoot another, or you can press the shutter button again and it will exit the scene mode. Some people that I showed this feature to found it a little confusing, since the camera typically waits for the face to stop smiling and then smile again before snapping a second picture. It wasn't too intuitive to most people that you'd have to stop smiling, then smile again before the camera would take a second picture. If you find the feature unresponsive, there's a smile level adjustment in the setup menu, though I did fine by leaving it on the medium setting.
Other than those features and the ones mentioned at the top of the review, the T70 is very similar to other recent T-series models. There are a handful of in-camera editing features, including red-eye reduction, dynamic-range optimization, and various filters to add effects to your photos. You won't find manual exposure controls, but that would be rare for an ultracompact camera anyway. You will find sensitivity settings ranging from ISO 80 through ISO 3,200--more on that in the image quality discussion below.
In the CNET Labs' performance tests, the Cyber-shot DSC-T70 fared well, though its flash takes a while to recycle. The camera took 1.5 seconds to start up and capture its first JPEG. Subsequent JPEGs took 1.3 seconds between shots with the flash turned off, slowing to 3 seconds between shots with the flash turned on. Shutter lag measured 0.4 second in our high-contrast test and 1.2 seconds in low-contrast, which mimic bright and dim shooting conditions, respectively. Continuous shooting yielded an average of 2.1 frames per second regardless of image size or quality.
Image quality is impressive, with nice color accuracy and accurate exposures that tend to preserve shadow detail at the expense of highlight detail when forced to compromise. We also saw almost no colored fringing in our test photos. The camera's automatic white balance does a good job of neutralizing color under natural daylight or fluorescent lights, but turns in overly yellow results with incandescent lighting. However, its tungsten setting impressively neutralized our extremely yellow hot lights. The camera lens showed little in the way of distortion at its furthest telephoto setting, though you may notice some minor barrel distortion at its widest setting.
The camera captures a very good amount of detail, but, as usual, noise tends to obscure that when you reach higher ISOs. Noise remains well under control through ISO 200, but becomes noticeable at ISO 400 with a gentle speckling of off-color spots and a slight erosion of finer details, such as the texture of fabrics or strands of hair. At ISO 800, details like these blur away more, some shadow detail becomes lost, and images take on a more distinct grainy look. By ISO 1,600, so much fine detail and shadow detail is lost, and the grain becomes so heavy that I wouldn't count on being able to get decent prints, even at smaller sizes. I'd suggest steering clear of ISO 3,200 altogether and stay at ISO 800 and below if you plan on making prints.
If you don't mind the idea of a touch screen, and indeed some people find them appealing, then Sony's Cyber-shot DSC-T70 is definitely worth a look. For its price, it offers impressive performance and very nice image quality as long as you stick with the lower half of its ISO settings, which still gives you plenty of leeway in most shooting conditions. Add to that its optical image stabilization, various convenience features, and a very attractive body design, and you've got a nice little camera. Now if only they'd offer a non-touch-screen version, I'd be a happy camper.
(Smaller bars indicate better performance)
 | Typical shot-to-shot time | | Time to first shot | | Shutter lag (typical) |
(Longer bars indicate better performance)