Sigma S 60-600 mm f/4.5-6.3 DG OS HSM
6. Distortion
If you focus on the smaller APS-C/DX sensor the distortion problems seem practically imperceptible. The results we got at 60, 100, 200, 300, 400 and 600 mm are as follows: -0.75%, -0.03%, +0.20%, +0.24%, +0.28%, +0.30%. In the 100-600 mm range you don’t have the smallest chances to notice any deformations because all of them amount to, within the margin of error, zero. If you look carefully only the 60 mm focal length shows some slightly noticeable barrel distortion.
On full frame the 60 mm focal length again fares the worst with a result of -1.77%, quite high for a telephoto lens. Overall, though, when it comes to absolute terms all these values are lower than 2% and they should be considered just moderate.
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The increase of the focal length makes our distortion problems end completely. At 100 mm we got -0.08%, at 200 mm the aberration was +0.44%, at 300 mm +0.54%, at 400 mm +0.67% and at 600 mm its level amounted to +0.71%.
| Canon 50D, 60 mm | |||
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| Canon 50D, 100 mm | |||
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| Canon 50D, 200 mm | |||
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| Canon 50D, 300 mm | |||
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| Canon 50D, 400 mm | |||
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| Canon 50D, 600 mm | |||
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| Canon 5D Mark III, 60 mm | |||
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| Canon 5D Mark III, 100 mm | |||
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| Canon 5D Mark III, 200 mm | |||
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| Canon 5D Mark III, 300 mm | |||
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| Canon 5D Mark III, 400 mm | |||
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| Canon 5D Mark III, 600 mm | |||
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