I just bought a wireless shutter release for my D300, purchased from Gadget Infinity for $30 US. There are models for a few different cameras and manufacturers.  It’s nice for a few reasons: it’s radio based rather than IR based (ALTHOUGH it’s my understanding that in some countries, it’s illegal to use certain radio transmitters that aren’t licensed, so BEWARE), it’s SIGNFICANTLY cheaper than the equivalent IR based system from Nikon, and finally it’s cheaper than the same product, relabeled as another manufacturer that is available in many camera stores. I saw a similar product in a local camera store for $100 US. It was the exact same product, yet it was $70 more expensive!

It claims 30m distance for use, but I’ve only tested it at about 30 ft — and it worked fine. If I ever test it at greater distances, I’ll post an update here.

Gadget Infinity which is based in Hong Kong, shipped the product the next business day after I placed the order airmail, and it came in about 10 days.