en-us https://www.intensedebate.com/users/533322 Comments by noelguerrero http://reviews.davidleetong.com/reviews/review-nissin-di622-speedlight-for-canon/#IDComment28464392 My nephew who works for Petrophil watched a professional photoshoot on the company's helipad. All of the slaves used were Nissin Di622 models firing optically in unison with Nikon SB flash units. Mon, 27 Jul 2009 02:18:45 +0000 http://reviews.davidleetong.com/reviews/review-nissin-di622-speedlight-for-canon/#IDComment28464392 http://reviews.davidleetong.com/reviews/review-nissin-di622-speedlight-for-canon/#IDComment28417037 For the moment, I'll be using it via cable after it failed with the Yong Nuo CTR 301s. Nothing wrong with the Nissin or the Yong Nuo though. It's just a compatibility issue. Cactus V4s have been confirmed to work flawlessly. I'll get this when needed. Sun, 26 Jul 2009 14:10:30 +0000 http://reviews.davidleetong.com/reviews/review-nissin-di622-speedlight-for-canon/#IDComment28417037 http://reviews.davidleetong.com/reviews/review-nissin-di622-speedlight-for-canon/#IDComment28416802 Don't worry about the sound. I've openned up my unit to look at the zoom mechanism. It's built tough. The gears are all metal driven by a very hefty motor. Sun, 26 Jul 2009 14:06:42 +0000 http://reviews.davidleetong.com/reviews/review-nissin-di622-speedlight-for-canon/#IDComment28416802