optoelectronic device for use as a monocular and optical device, having at least one image sensor (150), a display unit with a display surface for displaying image information, a control, optical elements for breaking light, an eyepiece (190) and at least one first sensor element (180), with:-the display resolution is greater than the image sensor resolution,-the optoelectronic device can be connected to an optical device,at least one first sensor element (180) in the field of the ocular (190), andThe control unit automatically switches from a first display mode, in which the image information recorded via the image sensor (150) is essentially displayed over the entire display area of the display unit, to at least a second display mode, where the image information recorded via the image sensor (150) is scalable in only one section of the display surface of the display unit, if at least one first sensor element (180) returns a feedback that the optoelectronic device is connected to an optical device,and the control unit automatically switches from at least one second display mode to thefirst display mode, if at least one first sensor element (180) returns a signal that the optoelectronic device is no longer connected to an optical device.
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