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  faces of the lens elements, thereby increasing the efficiency with which light is transmitted to the negative material. The chief advantages are the superior contrast obtained in black-and-white negatives, greater color purity in full-color pictures, lessened danger of flare in pictures taken against the light, and reduction of the intensity of the "ghost" images sometimes apparent when strong lights are included in the picture.

Precision mounting
      Contributing extensively to the quality of these Kodak Ektar lenses is the excellence of their mounting. After the lens elements are accurately assembled the complete assemblies are critically positioned in the mounts, and the lenses are prefocused by what is probably the most precise and scientific method to be found anywhere in lens manufacture. Inside the mounts are carefully calculated corrugations or "baffle rings" which, by trapping non-image-forming light entering the lens, give added contrast and prevent flare spots. The elements of the mounts themselves are held to extremely close manufacturing tolerances, and all bearings are especially designed for smooth, positive operation of focusing and

  
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