I'd appreciate advice for any special focus and lighting settings. Also ideas for buying (or constructing) a stand (for a 13.3 inch tablet) that would enable use of the rear-facing camera? Thanks. ...wdc
Are we talking a quickie $50 project here, or something to use for the next 20 years that you wouldn't mind spending $1,000 on? There are many different ways of doing it.
For a document, flat lighting. That means a few lights from different sides (at least 4) at about a 45 degree angle to the paper (to eliminate glare). Or you can build a bank of fluorescent tubes with a reflector, or a bank of LEDs behind a diffuser. You might also want to use a drafting board and "drawing points" or double-sided tape to hold the paper flat without any tape or staples showing. (Or use a vacuum easel if you want to get fancy.) The camera should be able to focus at the distance you need to be to get the whole page in the view (assuming it's an autofocus camera - if it's not, forget about taking pictures of documents.) Press a spot on the screen to focus, then press the camera icon to take the picture. Camera FV-5 Lite has a Macro mode if you need that.
As far as a stand, it depends on how elaborate you want to get. Some 2X3 lumber? Cast some aluminum into a foldable stand? It's like tripods - you can get one for $5 that sort of works if the camera is light, there's no breeze and you have a remote shutter release, or you can spend hundreds (or more) for one with a fluid head that can withstand an 8.0 earthquake without shaking and hold a 50 pound camera.