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Sony 75-300mm vs Sony 18-70mm wide-angle geometry comparison
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To compare the geometric distortion of the Sony 75-300mm against the Sony 18-70mm at their shortest focal lengths, we photographed a test chart consisting of a grid pattern
at an aperture of f8.
The images were then analysed with Imatest using 5th Order line calculation and
the full areas presented here at a reduced resolution. Smaller percentages are better.
Zoomed-out to 75mm, the Sony 75-300mm exhibited 2.04% barrel distortion. This isn't particularly noticeable, although if you're very sensitive to geometric distortion and wish to shoot at this focal length, you may prefer to use the 18-70mm kit lens zoomed-into 70mm, where it exhibits 0.27% pincushion distortion (as seen in the lower results). |
Sony 75-300mm
Using Sony Alpha A100 |
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Sony 18-70mm
Using Sony Alpha A100 |
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75-300mm at 75mm f8
Distortion: 2.04% barrel |
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18-70mm at 18mm f8
Distortion: 3.6% barrel |
Sony 75-300mm vs Sony 18-70mm telephoto geometry comparison
To compare the geometric distortion of the Sony 75-300mm against the Sony 18-70mm at their longest focal lengths, we photographed a test chart consisting of a grid pattern
at an aperture of f8.
The images were then analysed with Imatest using 5th Order line calculation and
the full areas presented here at a reduced resolution. Smaller percentages are better.
Zoomed-into its longest focal length, the Sony 75-300mm exhibits 0.9% pincushion distortion. |
Sony 75-300mm
Using Sony Alpha A100 |
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Sony 18-70mm
Using Sony Alpha A100 |
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75-300mm at 300mm f8
Distortion: 0.9% pincushion |
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18-70mm at 70mm f8
Distortion: 0.27% pincushion |
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