|The colours the Olympus SP570 UZ produces are true to nature and show a slight difference at 200 and 1600 ISO. The remaining sensitivity settings are very precise as far as colour reproduction is concerned. Performance in relation to the white balance is, without exception, excellent. The whole range of ISO settings of the Olympus SP570 UZ, with a small exception at ISO 1600, delivers a very consistent and precise white balance. The best results are obtained when setting the white balance manually. In normal circumstances this is not really necessary but in situations with predominating incandescent or fluorescent light, using a manual setting is the advice in order to obtain a maximum result. |
|ISO values of the Olympus SP-570UZ
A small sensor with many Megapixels usually has to pay its dues when we look at the technical test results of the DIWA Labs test lab. The Olympus SP-570 UZ Megazoom camera is equipped with a 1/2.33 inch CCD image sensor and ten Megapixels of resolution. Olympus, too, seem sensitive for the strong demands the marketing department comes up with. "Because the consumer wants it" the number of Megapixels is enlarged time and time again, and whatever the R&D department has to say to it, they are being ignored. Back to the test bank where we have to determine that the Olympus SP-570 offers a good signal/noise ratio up to ISO 100, but it seems that from ISO 200 the camera already gives up. Especially the red and blue channels show a huge 'grainy' result. The green channel is able to keep up with ISO 200 but shows the same grain values at ISO 400. From ISO 200 up to and including ISO 800 the camera shows a consistent granular result, to collapse completely at ISO 1600. To use an ISO setting this high for this camera is almost impossible. The high ISO values of 3200 and 6400 are more useful however, with a resolution lowered to 5 Megapixels.
Olympus SP-570 UZ vs SP-560 UZ
The Olympus SP570UZ is the successor to the SP560, but when we compare the test results we have to conclude that the SP-560 UZ shows a better signal/noise ratio. The eight Megapixels on an almost equally large sensor compared to the ten Megapixels of the SP-570 UZ deliver fewer pixels but do deliver a qualitatively better ISO. The whole range of 50 (64 at the SP-570) up and including 1600 ISO of the SP-560 offers a structurally better signal/noise ratio.
|Dynamic range of the Olympus SP570
The dynamic range of the Olympus SP-570 UZ camera is excellent up to and including ISO 400, and decreases a bit at 800 ISO. At ISO 1600 the dynamic range decreases considerably and next at ISO 3200 and 6400 (lower resolution: 5MP instead of 10MP) it picks up again and shows an excellent dynamic range. The measurements of the DIWA Labs show a decreasing curve, so the conclusion is that the dynamic range of the Olympus SP-570 UZ is fine up to and including ISO 400 yet diminishes at the higher ISOs.
Distortion of the wide angle
As expected distortion is visible in the 26mm wide angle, although still within reason at maximum aperture of f/2.8; the average distortion of the lens measured over the entire aperture range is certainly acceptable at wide angle and is hardly visible when fully zoomed out. An excellent result for a large optical zoom range like this. The lens suffers from visible chromatic aberration though, particularly and in wide angle and the maximum telephoto mode.
Olympus SP570 UZ in practise
Developing a Megazoom compact camera with a 20x optical zoom range does ask a lot of the lens design. In practice it often comes down to making concessions, and in the case of the Olympus SP-570 UZ it suffers clearly from chromatic aberration, with on the other hand a surprisingly good result on distortion. The possibility of capturing objects as close-ups from a large distance with a compact size camera generally strongly appeals to the user. If you accept the concessions that were made, you will get a powerful compact-sized all-round camera in return.