https://www.cloudsoo.com/blog/%e7%84%a1%e7%b7%9a%e8%a7%b8%e7%99%bc%e5%b0%87%e6%9c%83%e5%87%ba%e7%8f%be%e5%9c%a8canon-%e7%9a%84%e9%97%aa%e5%85%89%e7%81%af%ef%bc%9f/
無線觸發將會出現在CANON 的闪光灯?