Canon EF 70-300 mm f/4-5.6 L IS USM
6. Distortion
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|
70 mm |
135 mm |
200 mm |
300 mm |
|
APS-C/DX |
−0.58% |
0.50% |
0.73% |
0.76% |
| FF |
−1.61% |
1.29% |
1.84% |
1.87% |
For comparison we also present a similar chart with the results of the Tamron 70-300 mm VC, tested by us not so long ago.
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|
|
70 mm |
135 mm |
200 mm |
300 mm |
|
APS-C/DX |
−0.10% |
0.80% |
0.82% |
0.81% |
| FF |
−0.09% |
2.12% |
2.05% |
1.89% |
You can see a noticeable difference in approach implemented by the designers of these two lenses. Tamron optics specialists decided to correct distortion almost perfectly at 70 mm and increase its level at longer focal end. In the case of the Canon at the shortest focal length there is a visible “barrel” but the results at longer focal lengths are a bit better than those of the Tamron.
What is important, though, when it comes to the absolute values, the distortion is lower than 2% everywhere so it never becomes a bothersome issue.
| Canon 50D, 70 mm | |||
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| Canon 50D, 135 mm | |||
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| Canon 50D, 200 mm | |||
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| Canon 50D, 300 mm | |||
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| Canon 1Ds MkIII, 70 mm | |||
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| Canon 1Ds MkIII, 135 mm | |||
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| Canon 1Ds MkIII, 200 mm | |||
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| Canon 1Ds MkIII, 300 mm | |||
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