Gastrocamera The gastrocamera is a miniature camera that can be inserted into the stomach for medical examination and diagnosis. It was invented in Japan in 1950 and has since become a vital diagnostic instrument for the early detection of ulcers and cancer. The camera itself is 12.7 mm in diameter,the connection device l0.2mm in diameter. The camera has a wide angle,fixed-focus, fixed-aperture lens (focal length f3, aperture fl/10, angle of field 80 degree). Exposure is synchronized with flash illumination from a tiny tungsten bulb.The position and direction of the camera in the stomach can be observedfrom the outside by passing air into the stomach and focusing light on the abdominal wall. Recent developments have made examination less uncomfortable for the patient. This has come about through the application of fibre optics; the gastrocamera included in the capsule requires only the lens and light source to be inserted into the body.