Camera hacking [Hands On]

Back in the day, hands-on photography required you to be closeted away in a darkened room, where you dunked sheets of paper into solutions of smelly chemicals. Now we manipulate photographs with software, a much less messy and oppressive process. But wouldn´t it be great to have more control still- even before the photo is taken? Many cameras allow you to adjust their exposure settings manually, but that´s about it. What if you could have full command of your camera´s hardware?