This is a composite microscope which allows us to observe great details of the object in high precision. It consists of a tube in which there are two converging lenses, the objective and the eyepiece ones. The subject to enlarge is placed into two tablets, and behind the tablets there is a reflector. In addition there is a screw by which we can achieve an appropriate focal length. The objective lens is located about 20cm from the eyepiece lens, from which we can look at the object. We pose the object AB between the two plates and in front of the objective lens (having short focal length) in a way that the lens themself form a real and magnified image A'B’. The A’B’ is formed between the optical center of the eyepiece and its main past. We observe the actual image A'B’ using the eyepiece lens which act as "magnifier" and give the final virtual image A’’B’’ inverted, and much bigger than the object AB and at equal distance to the distance of sharp vision. In the compound microscope eyepiece and objective lens are not simple lenses. They are systems of two or more lenses. More specific, this composite microscope consists of two converging objective lens and two pairs of convergent-divergent eyepiece lens, where their growth is labeling. The reason for this is so both to avoid the various defects of the lenses, and to achieve the concentration of the light so that observatory object can be clearly visible.