对光 (duì guāng) — to focus (a camera, telescope, or optical instrument); to adjust the power (of eyeglasses during an eye exam)

Definition

Examples

• 拍照之前要先对光。
  Pāi zhào zhī qián yào xiān duì guāng.
  You need to focus first before taking a photo.
• 他帮我对了一次光，眼镜就清楚了。
  Tā bāng wǒ duì le yí cì guāng, yǎn jìng jiù qīng chǔ le.
  He adjusted the power once for me, and the glasses became clear.
• 这台相机自动对光，不用手动调。
  Zhè tái xiàng jī zì dòng duì guāng, bú yòng shǒu dòng tiáo.
  This camera focuses automatically, no need to adjust manually.