As a camera the T2 features a Carl Zeiss 38mm f/2.8 T* lens, Program and aperture priority modes. Aperture range is f/2.8-f/16. Shutter speed range is 1 to 1/500th seconds in Program mode. ISO range is ISO 25 to 5000. The camera relies on one CR123A battery. The camera is primarily an autofocus camera, but you can opt for manual focus if necessary. T2 is the ability to change lens aperture via a ring around the lens mount.