Why does my lens focus past the infinity point?

Why does my lens focus past the infinity point?

Again, we are back to the varifocal nature of most lenses, which means that infinity focus will shift with different focal lengths. In addition, lens components will expand and contract with temperature changes, which will also affect the focus position. Plus, a hard stop at the point of infinity is likely to damage – or reduce the life of – the strong motors required to move focusing elements speedily, so all things considered, it’s probably no bad thing.

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