Olympus SP 550 Ultra Zoom - Olympus SP-550UZ wide-angle geometry comparison-
-
Written by Gordon Laing
- Intro
- Olympus SP-550UZ design and build quality
- Olympus SP-550UZ lens
- Olympus SP-550UZ screen
- Olympus SP-550UZ sensor
- Olympus SP-550UZ vs Panasonic Lumix FZ50 outdoor scene
- Olympus SP-550UZ resolution comparison
- Olympus SP-550UZ noise level comparison
- Olympus SP-550UZ vs Panasonic Lumix FZ50 real-life noise
- Olympus SP-550UZ corner sharpness comparison
- Olympus SP-550UZ purple fringing comparison
- Olympus SP-550UZ wide-angle geometry comparison
- Olympus SP-550UZ wide-angle uniformity comparison
- Olympus SP-550UZ Gallery
- Olympus SP-550UZ verdict
- Olympus SP-550UZ video tour
Olympus SP-550UZ wide-angle geometry comparison
Olympus SP-550UZ results continued…
Outdoor / Resolution / Noise / Noise 2 / Corner sharpness / Fringe & macro / Geometry / Vignetting
To measure and compare the Olympus SP-550UZ’s geometric distortion we photographed a test chart consisting of a grid pattern, using it and a number of rival models. Here are the results for each camera with their lenses at their widest focal length. The images were analysed with Imatest using 5th Order line calculation and the full areas presented here at a reduced resolution. | ||
4.7-84.2mm at 4.7mm f5.6 | ||
| The image above was taken with the Olympus SP-550UZ zoomed-out to 4.7mm. Barrel distortion was measured at 3.33% which is roughly in the middle of the pack: it’s virtually identical to the Canon G7, slightly better than the Nikon D40’s kit lens, but not as good as the Panasonic FZ50. |
Canon PowerShot G7 |
Nikon D40 Using DX 18-55mm II |
Panasonic DMC-FZ50 | ||
 |  |  | ||
|
7.4-44.4mm at 7.4mm Distortion: 3.34% barrel |
DX 18-55mm II at 18mm f8 Distortion: 3.73% barrel |
7.4-88.8mm at 7.4mm Distortion: 2.56% barrel |
Olympus SP-550UZ telephoto geometry comparison
 | To measure and compare the Olympus SP-550UZ’s geometric distortion we photographed a test chart consisting of a grid pattern, using it and a number of rival models. Here are the results for each camera with their lenses at their longest focal length. The images were analysed with Imatest using 5th Order line calculation and the full areas presented here at a reduced resolution. | |
|
4.7-84.2mm at 84.2mm f5.6 Distortion: 1.45% pincushion | ||
| The image above was taken with the Olympus SP-550UZ zoomed-in to 84.2mm. Pincushion distortion was measured at 1.45% which is noticeably worse than the other cameras tested below; indeed the inward bending of straight lines is quite clear in the sample above. Again to be fair, the SP-550UZ does have a massive optical zoom range, and this is clearly one of the compromises. Luckily most subjects with very straight lines, such as buildings, are more likely to be photographed at shorter focal lengths where the distortion would be less apparent. |
Canon PowerShot G7 |
Nikon D40 Using DX 18-55mm II |
Panasonic DMC-FZ50 | ||
 |  |  | ||
|
7.4-44.4mm at 44.4mm f5.6 Distortion: 0.28% pincushion |
DX 18-55mm II at 55mm f8 Distortion: 0.21% barrel |
7.4-88.8mm at 88.8mm Distortion: 0.34% barrel |
