Quantity   Component name
1 × Firefly MV 0.3 MP Mono USB 2.0 A posh monochromatic camera with a convenient window for mounting filters. It doesn't really qualify as low cost so I'll be looking for a replacement. It has been very useful while prototyping though.
1 × Raspberry Pi 2 Model B Handles frame grabbing from the camera, and storage of footage. I plan to do MUCH more with this in the future.
1 × Adafruit Ultimate GPS Breakout Will be used to trigger footage capture in the near future, possibly more further on. Again, there are cheaper options around but it's what I had on hand for prototyping.