A utility vehicle for removably mounting and carrying a plurality of different equipment, such as turf maintenance equipment, is provided. The first lens group is formed of one lens element, and the second lens group is formed of one or two lens elements. Said means are also designed to halt said air flow for a period of time and said temperature sensor is designed to measure, towards the end of said period of time, a second temperature level T2. This construction may be used in articles of footwear having cleats or other traction elements. According to the method, infrared light maybe directly incident into an imaging apparatus of a person conducting an unauthorized copying act so as to adversely affect the unauthorized copying. At least one cover plate is mounted within the frame.