I ordered the radio trigger for macro shots to trigger the recording without shaking (undzwar comfortable than with the 10-sec self-timer). Works without problems. The range is approximately 3m. For large group portraits that could be a bit short. In addition, the trigger has only one function: triggering. A 2-sec-delay does not exist. What I found a bit of a shame: Continuous shooting is not possible either. Each image must be triggered off individually. Long exposures work fine. The first press starts, the second press stops recording (in bulb mode). A video can not be started using the remote control. For my application, I am completely satisfied.