I was fascinated by the lecture on light tables in the NYI Pro Course and then had the idea to use the iPad 2 as a mini light table. My camera set up was the Canon 50d with a 24-70mm 1:2.8 L lens. Because of the rather long exposure times (between 1/3 and 10 seconds), I needed a tripod and a 2 second shutter delay to avoid shaking the camera when pressing the release button. All pictures are large JPEG and the ISO is set to 100. I started with a couple of pictures taken in P mode and then used these values as the basis for manual changes to aperture and time.
I came across a number of problems. My first setup was on the dining table. I found too many reflections from various windows to be a little disturbing. I could close the shades on one side, but not on the other. I have played around with a reflector and two household flashlights. One of them was directed at the backdrop, which created a nice separation but did not really help with the reflections. Then, I relocated the set to the hobby room in the basement. Because of some reconstruction, we store a lot of stuff there and it is absolutely cluttered and full. But only one window which could be covered with a dark cloth. Now I had full control of the lighting. The iPad light from below, two flashlights and a standard floor lamp did the job.
Finally, the depth of field was an issue. To make the background nice and soft I first used a wide aperture of 2.8. The depth of field often was too shallow, which was nice in some pictures but not in others. The other extreme at f22 created a sharp and crisp image, but also showed every little piece of dust, dirt or roughness of the backdrop. I finally ended up with f 6.3 as a middle ground that felt and looked right to me. I really like the "sparkle" at the side of the sherry glass, which I have created by pointing a flashlight from behind the set at the glass and using a small aperture.