An optoelectronic sensor system for detecting objects in a monitored zone, comprising - a light transmitter for transmitting transmitted light into the monitored zone along a transmitted light path; - a light receiver for receiving received light from the monitored zone that is remitted along a received light path (24A, 24B) in the direction of the light receiver from an object to be detected in the monitored zone or from a reflector bounding the monitored zone; and - an objective arrangement (18A, 18B) arranged in front of the light transmitter and the light receiver, wherein the transmitted light path and the received light path (24A, 24B) extend spaced apart from one another at least in respective part sections (22, 26) which face the light transmitter and the light receiver respectively, characterized in that the sensor system comprises at least one deflection element (30, 32); in that the objective arrangement (18A, 18B) has a first objective region and a second objective region at least laterally spaced apart from the first objective region, with the transmitted light path running through the first objective region; and in that the sensor system has a reception space which is provided between the objective arrangement (18A, 18B), on the one hand, and the light transmitter and the light receiver, on the other hand, and in which at least one deflection element (30, 32) can be selectively inserted which is configured to define the received light path (24A, 24B) such that it runs through the first objective region with the deflection element (30, 32) introduced and through the second objective region with the deflection element (30, 32) not introduced. - a light transmitter for transmitting transmitted light into the monitored zone along a transmitted light path; - a light receiver for receiving received light from the monitored zone that is remitted along a received light path (24A, 24B) in the direction of the light receiver from an object to be detected in the monitored zone or from a reflector bounding the monitored zone; and - an objective arrangement (18A, 18B) arranged in front of the light transmitter and the light receiver, wherein the transmitted light path and the received light path (24A, 24B) extend spaced apart from one another at least in respective part sections (22, 26) which face the light transmitter and the light receiver respectively, characterized in that the sensor system comprises at least one deflection element (30, 32); in that the objective arrangement (18A, 18B) has a first objective region and a second objective region at least laterally spaced apart from the first objective region, with the transmitted light path running through the first objective region; and in that the sensor system has a reception space which is provided between the objective arrangement (18A, 18B), on the one hand, and the light transmitter and the light receiver, on the other hand, and in which at least one deflection element (30, 32) can be selectively inserted which is configured to define the received light path (24A, 24B) such that it runs through the first objective region with the deflection element (30, 32) introduced and through the second objective region with the deflection element (30, 32) not introduced.