>A friend recommended this unit to me: > >http://www.amazon.com/RFN-4s-Wireless-Shutter-Release-connection/dp/B005PCDSBQ > >You can read the specs and all of the reviews there and on >other sites. Other than a lousy, hard to remember name, it is >a GREAT product, packaged nicely, and is priced for under $70. >I bought one and it stays on the D800 most of the time. I plan >on picking up another to leave on the D4. Both the receiver >and the transmitter are tiny. Read all of the reviews and you >will get a better idea.
In reading the reviews on Amazon.com it appears the unit has a problem if you want to do a 5 or more shot bracket, using CH, for HDR. It seems to lock up.
Also another review notes it is very hard to fit your hand on the thread knob to attach or remove the device from the camera body. Suggests once attached to leave it there, but then complains how the antennae gets damaged when putting camera in and out of bag with trigger attached.
I use a Photix remote myself and don't have a problem with shooting high speed.