Listed below and comment the main features which should be evaluated when choosing a view based on the main characteristic to assess in this field is the size of the sensor: the sensor mount digital cameras of different sizes according to various factors, primary among them is economic. The sensors of digital cameras, in fact, are cut from silicon wafers, with increasing size also increases the potential for defects, as well as decreases the number of pieces that can be drawn. That’s because normally the larger sensors are located on the machines of professional or semiprofessional and then medium-high. To give some examples, the new Canon EOS 1Ds or 5D mount sensors 24×36mm, about the size of the film., While the Canon 20D and Canon Rebel XT (350D) have smaller sensors (corresponding respectively to 2.7 and 22.2 × 15.1 mm × 14.8 mm).