A system which allows identification of a consumer as belonging to a designated category and makes special offers available to consumers who are members of the designated category is described. A electronic device accesses live visual data through a camera associated with an electronic device. The rotation of the adjustment collar on the lens assembly is limited to not more than a single revolution through the use of cooperative stops that are fixed relation to the lens and housing respectively. Related receivers are also discussed. A single pass synthesis methodology for multi-class execution stage logic is also described.