the infinity when the target appears in the vision field of the viewer the latter moves the reticle image and hence the rifle to which the sight 20 is attached and aims the weapon to the target by superposing the reticle image onto the target image reference numeral 42 designates a power source e g a lithium battery which supplies electric current to the led 40 to this point of the explanation the optical sight is generally the same as the conventional optical sight with a reticle illuminated by a led a distinguishing feature of the optical sight of the invention is a set of reticle elements and a method of generation of selected reticles which can be aligned with the optical axis of the sight by using electric means i e without moving any parts of reticles or reticle combinations more specifically as shown in fig2 a which is a view of the led 40 in the direction of arrow a of fig1 the reticle is formed on the outer surface of the led 40 fig2 b is a sectional view along the line iib iib of fig2 a the arrangement of the led shown in fig2 b is known as to can the led unit consists of a metallic led holder 41 which supports the led 40 the led 40 is covered with a cup shaped cover 43 the upper electrodes which will be described later of the led 40 are connected to output terminals 45 a 45 b 45 c which protrude outside the led assembly through insilators 47 a 47 b 47 c.