I am slightly handicapped, and need to use a remote to fire my D600 even when I am holding it in my hands. I have tried every conceivable combination of wired, wireless, and direct firing method I've been able to find. The best, bar none, is the Nikon WR-R10/WR-T10 Radio Frequency Transceiver combo. It's pricy, but very good. The Infra-Red ones are hard to mount on the camera because of the location of the sensors (front and rear) and the line-of-sight nature of light. The RF remote, on the other hand, doesn't care about that, because it's, well, RF. I have to use a handle mounted to the tripod socket, so that gives me a perfect mount for the transmitter. Highly recommended.