16-35mm GM corners sharp, but not at the same time

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shadewind Regular Member • Posts: 106
16-35mm GM corners sharp, but not at the same time

I have a Sony 16-35mm f/2.8 GM and I've noticed that usually the left bottom corner is slightly softer than the right. However, in the occasional photo I see the opposite. I realized that it's related to focus distance, one corner is sharper than the other when at infinity, the other one is sharper when focused closer.

Example 1
Example 2

Is this normal? Is it a bad copy? Am I just OCDing?

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