你可以放大15倍来精确对焦。

You can magnify the scene up to 15 times for precise manual focusing.

youdao

取景器图像对镜头精确对焦是非常重要的，它将影响图像的清晰度。拍摄不同用途的照片常常需要不同的对焦屏。

The viewfinder image is crucial for accurate focusing of the lens, and therefore greatly influences image sharpness. Different photographic applications often require different focusing screens.

youdao

中心对焦对许多相机而言更为精确敏感，所以最好使用中心对焦而不是外部对焦——即便对焦后需要重新调整稳定。

The central focus point is more accurate/sensitive in many cameras, and so it is best to use this (instead of the outer focus points) — even if using it requires having to recompose afterwards.

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