Sony DSC-T10 Exposure
The Sony DSC-T10 is basically a point-and-shoot camera, which means it has almost entirely automatic exposure control, although the user can dial in an exposure compensation adjustment to help the camera deal with subjects that are light or dark overall. Other user controls include ISO (sensor sensitivity) and white balance, as well as contrast, saturation, and sharpness settings. The T10 provides a good assortment of controls for advanced users to twiddle with, but in the main but you have no direct control over either aperture or shutter speed. A fully automatic mode can be set via the Record menu, hiding most of the options and requiring little more than just pointing the camera and shooting the picture.
While the Sony T10 doesn't let you control exposure directly, it does give you a nice handful of "Scene" modes to help capture good-looking pictures under challenging conditions. Scene options include Beach, Fireworks, High Sensitivity, High Speed Shutter, Landscape, Snow, Soft Snap, Twilight, and Twilight Portrait exposure modes.
When it's time to print your photos, the Sony T10 does an excellent job, packing sufficient detail into its images to make good-looking 13x19 inch prints, about the largest consumer inkjet printers can produce. We did find that its images at ISO 400 showed more image noise than some cameras, but they still made acceptable-looking 8x10 inch prints, and fine-looking 5x7 inch ones.
Here's what we found in the T10's test images:
Saturation & Hue Accuracy
Good overall color, though a slight tendency toward a warm cast. Some oversaturation in the strong reds and blues.
Most consumer digital cameras produce color that's more highly saturated (more intense) than found in the original subjects. This is simply because most people like their color a bit brighter than life. The Sony DSC-T10 oversaturates strong red and blue tones somewhat, but is pretty restrained in its handling of other colors. Most consumers like bright, vibrant color, so we suspect many will find the T10's color very appealing. Where oversaturation is most problematic is on Caucasian skin tones, as it's very easy for these "memory colors" to be seen as too bright, too pink, too yellow, etc. The DSC-T10 did render skin tones just slightly on the warm side in most cases, but again, many consumers will likely prefer "healthier" looking skin.
The other important part of color rendition is hue accuracy. Hue is "what color" the color is. Most digital cameras we test push cyan tones towards blue quite a bit, a common tactic to produce better-looking sky colors. The T10 did this more than most, but in our shots taken outdoors, the sky colors never looked unnatural. All in all, bright color, especially blues, but color that we think most consumers will find very appealing.
Exposure and White Balance
Indoors, incandescent lighting
Moderate warm cast with both Auto and Incandescent white balance settings. Average exposure compensation required.
|Auto White Balance +1.0 EV||Incandescent WB +1.0 EV|
Color balance indoors under incandescent lighting was quite warm with both the Auto and Incandescent white balance modes, though the Incandescent setting resulted in the least strongest cast. That said, the impact of the warm color balance was somewhat more evident on-screen than it was in prints made on the Canon i9900 printer here in our studio. Prints were still more yellow-looking than the original scene though. I found the best exposure with a +1.0 EV exposure compensation adjustment, although some highlights were slightly blown out at that level. (The shots at +0.7 EV seemed too dark overall though.) Colors are somewhat dark and yellow here, making the blue flowers very dark and purplish. (A common outcome for this shot.) Our test lighting for this shot is a mixture of 60 and 100 watt household incandescent bulbs, a pretty yellow light source, but a very common one in typical home settings here in the US.
Good color balance, bright colors. About average exposure accuracy, but a tendency to blow out strong highlights.
|Auto White Balance, +1.0 EV||Auto White Balance, Auto Exposure|
Outdoor shots generally showed accurate exposure but with a tendency to blow out strong highlights under harsh lighting. (The photos do, as a result, have a lot of "snap," that many consumers will find appealing.) Shadow detail was somewhat limited, but nothing that would cause concern for a consumer digital camera. Exposure accuracy overall was about average, the camera requiring the normal amount of exposure compensation we're accustomed to seeing with consumer digicams on these shots. (The shot of Marti above under our solar simulator has a lot of blown highlights at +1.0 EV, but the shot at +0.7 EV is awfully dark.)
High resolution, 1,500 - 1,600 lines of strong detail.
Our laboratory resolution chart revealed sharp, distinct line patterns down to about 1,500 lines per picture height horizontally (the vertical target lines), and about 1,600 lines per picture height vertically (the horizontal target lines), with extinction at around 1,800. Use these numbers to compare with other cameras of similar resolution, or use them to see just what higher resolution can mean in terms of potential detail. Beware that while you might be able to make out what looks like distinct lines at numbers higher than those we've mentioned here, the camera is just doing its best to continue interpreting the lines. If you zoom in and follow them from the wider portions, you'll see the lines converge and reappear several times, so the lines you see at 1,800 and higher are really only artifacts generated by the camera's imaging system.
|Strong detail to 1,500 lines horizontal||Strong detail to 1,600 lines vertical|
Sharpness & Detail
Fairly sharp images, slight oversharpening but relatively little blurring of detail from noise suppression.
Overall, the Sony DSC-T10's images are quite sharp, with moderate edge enhancement on the camera's part. (Edge enhancement creates the illusion of sharpness by enhancing colors and tones right at the edge of a rapid transition in color or tone.)
Noise-suppression systems in digital cameras tend to flatten-out detail in areas of subtle contrast. The effects can often be seen in shots of human hair, where the individual strands are lost and an almost "watercolor" look appears. The crop at far right shows this in the darkest areas of Marti's hair, which do show limited detail. That said, there are a few individual strands still visible in the darker midtones.
ISO & Noise Performance
Low to moderate noise at the normal sensitivity settings, very high noise that blurs detail at the higher settings.
(Sorry - bad motion blur,
very long exposure)
|ISO 100||ISO 200|
|ISO 400||ISO 800||ISO 1,000|
The Sony DSC-T10's lower ISO settings performed quite well, producing low to moderate noise with relatively blurring of fine detail due to noise suppression. Starting at ISO 400, noise becomes more evident, and the noise suppression processing begins to noticeably blur fine detail. The 800 and 1,000 ISO settings result in pretty blurry images, with a strong noise pattern that's quite noticeable. (When printed, the ISO 800 and 1000 shots look grainy and rough even at print sizes as small as 4x6 inches, although they'd likely be acceptable to most consumers at that size.)
Extremes: Sunlit and low light tests
Very high resolution with good overall detail, though high contrast and limited shadow detail. Limited low-light capabilities, but entirely acceptable images under average city street lighting, and Super SteadyShot image stabilization was very effective.
|+0.7 EV||+1.0 EV||+1.3 EV|
Because digital cameras are more like slide film than negative film (in that they tend to have a more limited tonal range), we test them in the harshest situations to see how they handle scenes with bright highlights and dark shadows, as well as what kind of sensitivity they have in low light. The shot above is designed to mimic the very harsh, contrasty effect of direct noonday sunlight, a very tough challenge for most digital cameras. (You can read details of this test here.)
The Sony Cyber-shot DSC-T10 produced high contrast in response to the deliberately harsh lighting in the test above, with hot highlights the result. Detail was slightly limited in the highlights and shadows (more so in the shadows), though still pretty good overall. Most consumers would probably prefer the shot above with a +1.0 EV exposure compensation adjustment, even though the highlights really are badly blown, as the exposure at +0.7 EV left Marti's face and the colors in the flowers too dark. (In "real life" though, be sure to use fill flash in situations like the one shown above; it's better to shoot in the shade when possible.)
The Sony DSC-T10's maximum two-second exposure time (one second in all but night modes) limited its low-light shooting capabilities somewhat, though the camera was able to capture bright images under average city street lighting quite easily. (The brightest light level in the test matrix above roughly corresponds to typical city street lighting.) At the higher ISO settings (800 and 1,000), the camera captured bright images to about 1/2 foot-candle, about half as bright as average city street lighting at night, but with very high image noise. The camera's autofocus system worked down to a little below the 1/4 foot-candle light level, even without the AF assist light, a very good performance.
Do keep in mind, that long shutter times demand the use of a tripod or other camera support to get sharp photos. (A useful trick is to just prop the camera on a convenient surface, and use its self-timer to release the shutter. This avoids any jiggling from your finger pressing the shutter button, and can work quite well when you don't have a tripod handy.) That said, we found the T10's Super SteadyShot image stabilization to be very effective, as we were in some cases able to get acceptable shots hand-holding the camera at exposure times of a half-second or more.
Coverage and Range
Pretty good coverage but limited range. Our studio shots required an intensity boost to produce proper exposure.
|38mm equivalent||114mm equivalent|
|Normal Flash, High Intensity||Slow-Sync Mode, High Intensity|
Flash coverage was a little uneven at wide angle, with falloff in the corners, and just slightly uneven even at telephoto. In the Indoor test, the DSC-T10's flash underexposed our subject at its default setting, and required the High Intensity adjustment in both normal and Slow-Sync flash modes. (This isn't unusual, most cameras we test need an exposure boost with this subject.) The normal flash mode resulted in a slight orange cast, but the longer shutter time associated with the Slow-Sync mode produced a much stronger cast (though more even exposure).
The T10's flash was bright to about 7 feet at wide angle, decreasing steadily in intensity from there on out. At telephoto, it was brightest at 6 feet, and decreased in brightness from there on.
|Manufacturer-Specified Flash Range|
|Wide Angle||Wide Angle|
Auto ISO 320
Our standard test method for flash range uses a fixed setting of ISO 100, to provide a fair basis of comparison between cameras. We've now also begun shooting two shots using the manufacturer-specified camera settings, at the range the company claims for the camera, to assess the validity of the specific claims. In the shots above, the T10 seems to perform exactly as Sony says it will, producing good exposures at the rated 9.2 foot distance with its ISO set to Auto (and lens to wide angle). This a decent range, but the camera is boosting its ISO pretty significantly in Auto mode to deliver it, which will increase image noise a fair bit. At ISO 1000, the image is very bright at the rated distance of 16.1 feet, but as noted elsewhere here, ISO 1000 shots are only marginally usable for 4x6 inch snapshot prints.
Excellent print quality, great color, very usable 13x19 inch prints. ISO 400 images are noisy at 8x10, acceptable at 5x7, best at 4x6. ISO 800 and 1000 shots are noisy and soft even at 4x6 inches.
Testing hundreds of digital cameras, we've found that you can only tell just so much about a camera's image quality by viewing its images on-screen. Ultimately, there's no substitute for printing a lot of images and examining them closely. For this reason, we now routinely print sample images from the cameras we test on our Canon i9900 studio printer, and on the Canon iP5000 here in the office. (See the Canon i9900 review for details on that model.)
The Sony DSC-T10's 7.2 megapixel sensor and unusually sharp (for a subcompact) 3x optical zoom lens produces crisp, clear images that look good even when printed as large as 13x19 inches. Prints 8x10 inches in size are tack-sharp and crisp looking, even with significant cropping. As usual, it's the high-ISO shots that present the real print-quality challenge, and here the T10 stumbled somewhat. Although the camera offers options for ISO 800 and 1000, ISO 400 was about as high as you could go with acceptable print quality. Daylight shots at ISO 400 looked fine when printed as large as 8x10 inches, while shots taken after dark showed more visible noise, particularly in dark areas.
The ISO 800 and 1000 options were very much a mixed blessing. Under reasonably bright lighting, the noise levels are such that most consumers would probably find 4x6 inch (perhaps even 5x7 inch) prints noisy but acceptable. This might make these very high ISO settings useful for freezing fast action in daylight conditions. (Sports shots, for instance.) When the sun goes down though, the images deteriorate quite a bit: Under low-light conditions (including indoor shots under the incandescent lighting so common in US households), noise gets much worse, to the point that the ISO 800 and 1000 sensitivity options are only marginally usable for 4x6 inch prints when shooting under these conditions. - Which unfortunately is exactly when many people would most want to use them.
In terms of color, the Sony T10's images printed up bright and beautiful on the i9900. Blues and strong reds are definitely very saturated, but we didn't find it objectionable on any of the shots we took. Caucasian skin tones came out slightly yellowish on a couple of shots, but that could have been a result of how the camera's white balance system responded to the lighting for those scenes. All in all, we think most consumers would find the T10's color very appealing.