1. From Apple’s iPad2 Manual about Camera:
Use the screen to control the back camera and to see the photo or video you’re
taking. You can tap anywhere on the screen to select a specific object or area, and
automatically adjust the exposure based on that part of the image. Autofocus (up to
about 4 inches or 10 cm) and a 5x digital zoom let you take great close-ups.
If you have an Internet connection and location services is turned on, photos and
videos are tagged with location data. You can use location data with some apps and
photo-sharing websites to track and post where you took the photos.
2. There are many Camera Apps, including 10x Camera Tools Pro, Incredibooth, Camera+, QuadCamera, Camera Bag, Timelapse. These offer additional control over your shoot such as camera modes, as well as digital zooming, a timer, full screen shooting.
http://appsineducation.blogspot.com/2011/06/camera-apps-for-your-ipad-classroom.html