https://kknews.cc/zh-tw/photography/9ybngzq.html
可調 光圈、快門…
1.景深教學--https://psc.pixnet.net/blog/post/47094515-focos-%E6%95%99%E5%AD%B8-%E8%BC%95%E9%AC%86%E8%A3%BD%E4%BD%9C%E5%87%BA%E6%9C%89%E6%99%AF%E6%B7%B1%E6%95%88%E6%9E%9C%E7%9A%84%E7%85%A7%E7%89%87