An image capturing apparatus previously captures a calibration image that serves as a reference when a distance to an object is calculated, and calculates, when an image of the object is captured using a monocular camera, the distance from the lens of the camera to the object using the calibration image and the distance from the lens of the camera to the calibration image. The collection nozzle includes a motive nozzle for accelerating a first portion of the fluid flow; and an induced-suction nozzle for receiving a second portion of the fluid flow. The comments are encrypted such that they cannot be accessed by all recipients of the message but only selected recipients of the message. A portion of each of the plurality of turns is between the first and the second pole.