and 1/30 s were dropped in favor of a more evenly running mechanism. Since 2006 it is sold in a stripped down version with only two shutter speeds (1/2 s and 1/60 s) as Horizon Kompakt. In 2003 an again reworked edition was presented, initially released as Horizon 203 but then called Horizon S3Pro. This upgrade focused on design and performance, leaving the technical specs as they were. In 2005 the Lomographic Society International and KMZ partnered to sell the camera together under the name Horizon Perfekt. From about 2000 to 2005 a medium format edition called Horizon 205 PC was produced in small numbers. This model, however, did not make it to mass production and was discontinued. Technical design Throughout all its history, the basic technical design remained unchanged: when the shutter button is pressed, a drum carrying the lens is rotating from left to right. Inside the camera through a small slit on the back of the drum, the captured image is projected on the film, which in turn also sits on a curved carrier. By varying the width of the slit, the time each segment of film is exposed to light is changed. With this trick, different shutter speeds can be achieved without changing the rotating speed of the drum. The entire mechanism is powered by a spring. The focus of the lens is fixed to the hyperfocal distance for the 28mm lens at f2.8 (approximately 13m which allows a depth of field from 5.5m to infinity). As the lens is stopped down the near focus limit increase by approximately 1m per stop to f8. F11 and f16 add about 0.5 m each so that by f16 all objects from about 1 meter onwards will be pictured sharp. On 35 mm film, the camera produces frames of a size of 24x58 mm. See also Noblex Widelux References External links ZenitCamera memorial site Krasnogorsky Zavod official site Panoramic photography with the 202 The Horizon 202 at Alfred's Camera Page Horizont User manual Horizon-202 User manual Horizon-S3Pro User manual Horizon-205 User manual Cameras Panoramic cameras Russian brands Soviet cameras