The Arriflex 35 was the first reflex 35mm production motion picture camera, released by German manufacturer Arri in 1937.
The mirror shutter allows the camera operator to see a viewfinder image equal to the recorded picture, without parallax, although there is noticeable image flicker in the viewfinder when the camera is running, caused by the two open exposure segments of the mirror shutter.
It is still used extensively in motion pictures for sequences without synchronous sound - "motor only sync" - and unique camera movement, e.g. on Steadicam.
It was widely used with 200 ft loads (the smaller 200 ft magazine was in production at that time) as a 'battlefield camera' for the German Wehrmacht during World War II for collecting battlefront intelligence, (e.g. for analyzing weapons effectiveness), for training films and for use in propaganda cinema films.
[2] The US army captured some models and brought this camera to the US in the 1940s, where it served as a prototype for the almost identical Cineflex PH 330.
The first American feature film made using a captured Arriflex 35 was Dark Passage by Delmer Daves.
It removed the turret and only featured a single PL mount, had a crystal sync handgrip motor with 12V and 5-50 fps, forward and reverse.