camera and to provide a safe place for the chambers when they are removed for the purpose of reloading them or for using the direct viewfinders.
The framing of the scene can be observed by installing the direct viewers, looking through them one at a time and integrating the total view mentally. The direct viewers go directly right behind the camera lenses and therefore there is no problem of parallax when they are used there. The "B" direct viewer is used in conjunction with the viewfinder on top of the camera. Here there is a problem of parallax. This is taken care of with the focusing knob on the right hand side of the viewfinder. This knob not only focuses the viewfinder, but also adjusts the parallax for the distances indicated on the side of the focusing knob.
The viewfinder for the #3 blimp is an optical viewfinder which shows all three sections of the picture simultaneously through one eyepiece. This viewfinder cannot be used with the other blimps or with the camera alone until they are adapted.
The lenses of the Cinerama camera have a focal length of 27mm and have far greater angle of view vertically than even an extremely wide angle lens on a regular 35mm camera. The image size, therefore, is comparatively small and in order to get an ECU shot the camera has to be extremely close to the subject; even