The TDC Stereo Vivid was produced between 1954-1960 and marketed under the TDC (Three Dimension Company, a subsidiary of Bell & Howell). It was the third and most advanced of TDC's stereo camera lineup. The Stereo Vivid is a beautiful camera - notable for its gorgeous front plate but also the design of its top plate which features a handy exposure calculator titled the Expo Sure (love it). The camera handily has a combined viewfinder and rangefinder in a single window that also includes a small bubble level for easy leveling of compositions. Focus is controlled by a knob on the top right corner of the camera, right next to the wind knob. The shutter button is located on the lower right front corner. Together it is easy to control both functions with separate fingers of the right hand, making the Stereo Vivid quite comfortable to use. The shutter is moderately limited with speeds ranging from 1/10 to 1/100 plus a Bulb mode. Apertures range from f3.5-f16. Both shutter and aperture are controlled by knobs atop the camera and adjusting either makes adjustments to the Expo Sure calculator. The Stereo Vivid usually features paired 35mm f3.5 Tridar Anastigmat lenses but early models apparently also could be found with Steinheil Cassar optics.