The human eye is a fascinating and complicated device, but how do digital cameras capture images? This unit examines one of the human–machine interfaces that link optical information to the electronic world. You will learn how the components within a digital camera capture images for electronic manipulation. This study unit is just one of many that can be found on LearningSpace, part of OpenLearn, a collection of open educational resources from The Open University. Published in ePub 2.0.1 format, some feature such as audio, video and linked PDF are not supported by all ePub readers.