Embodiments of the present invention comprise electronic projection systems and methods. When either high frequency or pulse electrical current is applied to the magnetic sensitive body, voltage is output from the above electromagnetic coil in response to the intensity of the external magnetic field which is generated in the electromagnetic coil. At least one of the enclosing chambers is aimed at enclosing, a pressurized environment and at least the other chamber is aimed at enclosing an environment, whose pressure is substantially constant and equal to the outside pressure. Removing the storage device from the data processor causes a non-disruptive customization of the data processor from the predetermined data set of customer requirements to the default data set of customer requirements. 7\u2003\u2003whenN2: a refractive index of the second lens at the d-lineN3: a refractive index of the third lens at the d-lineN4: a refractive index of the fourth lens at the d-line.