SB-800與Nikon TTL模式的觀念釐清

http://fluckie.pixnet.net/blog/post/19109482-sb-800%E8%88%87nikon-ttl%E6%A8%A1%E5%BC%8F%E7%9A%84%E8%A7%80%E5%BF%B5%E9%87%90%E6%B8%85