Raspberry Pi project - shutter control on Canon 7D

OK so I'm embarking on my first 'real' Raspberry Pi hack. I've got one running as a music server but that's not really what it's all about. It's time to do some GPIO and maybe work my way towards some real electronics.

What I've selected as my first project is to replicate something that's been done before - getting the Pi to trigger the shutter on my partners Canon 7D. As per http://www.ohmypi.com/2013/06/16/control-canon-camera-using-raspberry-pi-gpio-rpi-gpio-how-to/ and many others out there.

Here is my shopping kit:

• Raspberry Pi *
• GPIO ribbon cable*
• Basic Breadboard *
• Jumper Wires 6" M/M Pack of 10
• Asus USB-N10 **
• 0.5W Metal Film 470K 1% resistors (8 pack) **
• 2 x 2N222 NPN transistors **
• Pixel CL-N3 

* thanks to http://www.nicegear.co.nz

** thanks to Jaycar