Hack a Day has posted a perfect example of how inexpensive and easy it is to build yourself useful things instead of shopping for expensive electronics.  If you have looked at the prices of cameras or adapters which allow you to wirelessly take a picture you have probably been disappointed, but you don't have to stay that way.  Instead, take an existing manual remote trigger, add in a WiFi enabled SoC module like the ESP8266 suggested in the video, download and compile the code and the next thing you know you will have a camera with wireless focus and shutter trigger.  Not too shabby for a ~$5 investment.

"It’s just ridiculous how cheap and easy it is to do some things today that were both costly and difficult just two or three years ago. Case in point: Hackaday.io user [gamaral] built a WiFi remote control for his Canon E3 camera out of just three parts"

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