A sighting mechanism for a firearm, including a video camera, a video screen, a digital sighting distance meter, at least one sensor for measuring environment, cartridge and/or weapon parameters, at least one biometric sensor, at least one memory module for biometric data and/or munitions data and a digital computer. The sighting device includes at least two video cameras arranged in a parallel manner in relation to each other to capture the target sighting field. The computer has at least two video input points and an image processing unit enabling the video image data to be superimposed in real time in a pixel precise manner in relation to the target field and to be reproduced on the screen. The computer includes a ballistic computer which enables the target image to reproduced on the screen. A graticule, which is arranged in the superimposed screen or on the screen, can be positioned in an automatic manner and in real time according to the incoming data, such that the position of the graticule in the target field corresponds to a real projectile point of impact.