From what I understand "Big Bertha" was the name given to a number of Graflex 4x5 or 5x7 cameras that had a telephoto lens added by another company. This combination weighed in at 50 pounds or more. They once were a common sight at sporting events. The lever on the lens is used for focusing. This photo is from a 1950's ad for Exakta SLR's hoping to persuade the reader that the Exakta offers a more manageable size and comparable quality.
