2 sentences

1. 摄影师正在调整相机的焦距。

   shè​yǐng​shī zhèng​zài tiáo​zhěng xiàng​jī de jiāo​jù.

   The photographer is adjusting the camera's focus.

   Source: Dong Chinese Dictionary

2. 调整焦距可以使相机拍摄的画面更清晰。

   tiáo​zhěng jiāo​jù kě​yǐ shǐ xiàng​jī pāi​shè de huà​miàn gèng qīng​xī.

   Adjusting the focal length can make the camera's image clearer.

   Source: Dong Chinese Dictionary