Canon 70-200 2.8L IS SOFTNESS issues

Started Nov 6, 2006 | Discussions thread
Jan Madsen
Senior MemberPosts: 2,398
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Bad lens
In reply to Pedro Caseiro, Dec 7, 2006

As both the left and right sections have something in front of focus, and behind focus, you can easily compare left and right performance, but because the chart is not photographed exactly squarely on, not the same positions on the scale will be in focus (but almost). Right side looks very good, left side is clearly not ok - some spherical abberation leading to loss of contrast. Get the lens checked and adjusted, something is decentered in it (might only show up in parts of the focal range).
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  • Jan

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