第一点就是被一些专业人士所熟知的“裁切系数”(crop factor，也称镜头焦距转换率)。

The first is what is known as the 'crop factor'.

youdao

第一点就是被一些专业人士所熟知的“裁切系数”(crop factor，也称镜头焦距转换率)。

The first is what is known as the 'crop factor'.

youdao