210 Personal Content Experience: Managing Digital Life in the Mobile Age change, which is taking place very rapidly. The estimates of digital photos taken during 2004 vary between 20 billion to more than 200 billion. Either way, it is a lot of pixels. With digital photography, all aspects change. No need to restrict the amount of photos taken, and no need to wait until development to determine the quality of the photo. One could shoot dozens of photos of a single target just to make sure that at least one is successful, and determine immediately after shooting whether a shot is worth retaining or not. Since the cost of storing a single photo is practically zero, there is no need to worry about increasing costs. There are two signifi cant consequences of this. First, the amount of taken photos increases rapidly. Then the amount of photos taken of a single target increases. This poses new challenges in choosing the best shot out of so many. In fact, user interviews repeatedly reveal that this task is getting increasingly important – and diffi cult. Second, the post-processing of photos is more often transferred from a professional developer to a consumer. Our user studies clearly show that most users are not willing to edit or post-process their photos to any extent. The most common task related to editing is scaling the content for different purposes, such as publishing on a blog or sending through e-mail. Beyond scaling and occasional cropping, hardly any- thing else is done by the majority of consumer users. Amongst different photographing devices, there are signifi cant dif- ferences on the use patterns and expectations of the end result. With a dedicated digital camera, more time is spent on controlling the target and the camera itself. The user often frames the target more accurately, and spends some time on technical aspects, such as choosing a correct program. However, with a mobile phone equipped with a digital camera, the focus is on convenience and social aspects, such as taking a quick shot and then probably immediately sharing the photo with friends (photo sharing is discussed in section 7.3). The communications capability of a camphone is driving the use patterns towards sharing. Furthermore, since a phone is carried most of the time, whereas a digital camera is not, the camphone is used as a reserve recording device when the situation calls for it. Obviously, photos taken with a digital camera can also be shared. The process is in many cases more complicated – the photos need to be transferred to a PC, scaled down, and then posted on the Web or sent via e-mail. Interviewing a professional photographer, who recently migrated from the analogue to digital domain, revealed an interesting viewpoint. Instead of carefully framing the target before shooting (as was always done with analogue devices, as long as time permitted), he stated that