2022年8月10日
为啥长焦大光圈镜头贵
摘要： In optics, the f-number is the reciprocal [倒数] of the relative aperture (the aperture diameter divided by focal length). aperture: 1. narrow opening; 阅读全文
posted @ 2022-08-10 17:44 华容道专家 阅读(178) 评论(0) 推荐(0)