A portable device comprising a first portion and a second portion, the first portion having a first front surface and an opposite first back surface facing to front and back sides of the first portion, respectively; the first portion comprising an image sensor and a first imaging optical arrangement in a first imaging connection with the image sensor, so as to define a first field of view of the image sensor, and a viewing direction of the image sensor to the back side of the first portion; the second portion comprising a second imaging optical arrangement; the first and the second portions being movably coupled to allow adjustment of the device to a closed position with the second portion lying opposite to the first portion, against the first back surface, with the second imaging optical arrangement aligned with the first imaging optical arrangement to form a combined imaging optical arrangement in a second imaging connection, so as to define, together with the first imaging optical arrangement, a second field of view of the image sensor different from the first field of view, and the second portion lies outside the first field of view when the device is in an open position, wherein the first imaging connection is the configuration, and positioning relative to the image sensor, of the first imaging optical arrangement to form an image on the image sensor; and wherein the second imaging connection is the configuration, and positioned relative to the image sensor, of the combined imaging optical arrangement to form an image on the image sensor; characterized in that: the angle of the first field of view lies in a range of 60° to 120°; and the position of the first imaging optical arrangement, relative to the image sensor, changes between the first imaging connection and the second imaging connection. the first portion comprising an image sensor and a first imaging optical arrangement in a first imaging connection with the image sensor, so as to define a first field of view of the image sensor, and a viewing direction of the image sensor to the back side of the first portion; the second portion comprising a second imaging optical arrangement; the first and the second portions being movably coupled to allow adjustment of the device to a closed position with the second portion lying opposite to the first portion, against the first back surface, with the second imaging optical arrangement aligned with the first imaging optical arrangement to form a combined imaging optical arrangement in a second imaging connection, so as to define, together with the first imaging optical arrangement, a second field of view of the image sensor different from the first field of view, and the second portion lies outside the first field of view when the device is in an open position, wherein the first imaging connection is the configuration, and positioning relative to the image sensor, of the first imaging optical arrangement to form an image on the image sensor; and wherein the second imaging connection is the configuration, and positioned relative to the image sensor, of the combined imaging optical arrangement to form an image on the image sensor; the angle of the first field of view lies in a range of 60° to 120°; and the position of the first imaging optical arrangement, relative to the image sensor, changes between the first imaging connection and the second imaging connection.