A complex 13-element optical system dedicated to long-distance applications that was specifically developed to achieve an optimal resolution-to-performance-to-efficiency ratio, adapted for this use without significant loss of definition. The system is fitted with an extra-wide frontal lens that can achieve a minimum projection angle of 0.6° to 3.5° and a zoom ratio from 15x to 42x depending on the luminaire, its size, and its ultimate use. The use of new glass optics with reduced density ensures the equilibrium of the luminaire.