The invention relates to an objective (1) of an angularly viewing, rigid endoscope, comprising a prism arrangement that comprises two prisms (4, 7), which lie against each other at flat contact surfaces (6, 16) that are at an angle from the axis (18) of the objective (1). The distal prism (4) has a distal end face (3) that is perpendicular to the viewing direction (17) of the objective (1), from which distal end face beams (5) incident thereon enter the proximal prism (7) through the distal prism (4) and through a passage area (19) of the contact surfaces (6, 16) and, after being reflected twice in the proximal prism at a first mirror (9) on an angled surface (8) and at a second mirror (10) on the contact surface (16), exit through a surface (11) perpendicular to the axis of the objective in the direction of the axis (18) of the objective (1), and the second mirror (10); is arranged outside of the passage area (19). The objective according to the invention is characterized in that an absorption layer (15) is arranged in the plane (6, 16) of the second mirror (10) between the second mirror and the passage area (19).