Kodak Aero-Ektar 7" focal length, f/2.5 lens in very good shape. Variable f-stop from 2.5 - 16. The lens has one small air bubble about 3mm in diameter. These bubbles were commonly found in the Kodak lenses made in the 1950's. The bubble does not effect the image quality. A housing was constructed for the lens and accepts 4x5 sheet film. This housing can be modified for use with a 35mm or CCD camera. $100.00 + shipping.