对于很多相机来说无限远焦点并不是最佳的，所以你得不断调整三角架的位置，直到找到最清晰的无限远对焦点。
Since the infinity focus on many cameras is not perfect, you may have to experiment with the location of your tripod until you reach ultimate infinity focus.
无限远标志一个距离的设定，比如在照像机上，表示整个场景都在焦点内。
A distance setting, as on a camera, beyond which the entire field is in focus.
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