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Canon EF-S 17-55mm f/2.8 IS USM wide-angle geometry comparison
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17-55mm EF-S at 17mm f8
Distortion: 2.87% barrel |
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To measure and compare the Canon 17-55mm's
geometric distortion we photographed a test chart consisting of a grid pattern,
using it and a number of rival lenses.
The lenses were tested at
their widest focal lengths with an aperture of f8 in
Aperture Priority mode.
The images were analysed with Imatest using 5th
Order line calculation and the full areas presented here at a reduced resolution. |
The image above was taken with the Canon EF-S 17-55mm at 17mm f8. Barrel distortion was measured at 2.87% which is well below the other EF-S lenses on test and roughly the same as the EF 17-40mm L - this is impressive considering the latter is designed for a full-frame body, so should perform impeccably on an EF-S body. |
Canon EF-S 17-85mm f/4-5.6 IS USM |
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Canon EF-S 18-55mm f/3.5-5.6 |
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Canon EF 17-40mm f/4.0L USM |
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17-85mm EF-S at 17mm f8
Distortion: 5.71% barrel |
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18-55mm EF-S at 18mm f8
Distortion: 3.35% barrel |
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17-40mm EF L at 17mm f8
Distortion: 2.9% barrel |
Canon EF-S 17-55mm f/2.8 IS USM telephoto geometry comparison
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17-55mm EF-S at 55mm f8
Distortion: 1.09% pincushion |
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To measure and compare the Canon 17-55mm's
geometric distortion we photographed a test chart consisting of a grid pattern,
using it and a number of rival lenses.
The lenses were tested at
their longest focal lengths with an aperture of f8 in
Aperture Priority mode.
The images were analysed with Imatest using 5th
Order line calculation and the full areas presented here at a reduced resolution. |
| The image above was taken with the Canon EF-S 17-55mm at 55mm f8. Pincushion distortion was measured at 1.09% which is roughly similar to the EF-S 17-85mm lens, albeit not as good as the budget EF-S 18-55mm, nor, unsurprisingly, the EF 17-40mm. |
Canon EF-S 17-85mm f/4-5.6 IS USM |
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Canon EF-S 18-55mm f/3.5-5.6 |
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Canon EF 17-40mm f/4.0L USM |
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17-85mm EF-S at 85mm f8
Distortion: 0.967% pincushion |
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18-55mm EF-S at 55mm f8
Distortion: 0.389% pincushion |
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17-40mm EF L at 40mm f8
Distortion: 0.187% pincushion |
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