The application relates to an ergonomic tube for a microscope. A binocular head is provided on the tube. A deflection element is provided in the tube and a deflection mirror is assigned to the element, the mirror being located behind the optical path of the lens, when viewed from the user's position. A single tube-lens system is positioned in the optical path of the tube. A modification to the inclination of the oclar optical path in relation to the horizontal (H) by a value αcauses the position of the deflection mirror to be modified by an angle α/2.