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I think that a wired release is much prefered. With wired you have no worries about if an optical signal is going to get through. The Satechi one you mentioned seems to have the features you need that include interval between shots, and number of shots to be made. I am a long time user of the Canon version that has those functions, and it is nice, but it is more expensive. But back in the late 1990's there were really no third party choices to pick from, so I got the Canon TC80-N3, and have never had a need to look for anything else.