The Kodak was a camera box built in the shape of a parallelepiped. At the top it had a rotating key, on one side, the button to activate the shutter and, on the front, the camera lens. Inside, it had a rotating bar (this bar was soon replaced by a simpler mechanism due to its manufacturing price) to operate the shutter: when the user pressed the button to take a photograph, an inner rope was tightened and the photographic exposure began. Once the photograph had been taken, the user had to rotate the upper key to change the selected frame within the celluloid tape. The camera did not have a viewfinder, nonetheless, it included two V shape silhouettes at the top to facilitate the framing of the photographic subject. Furthermore, the Kodak was the first camera to make use of the flexible celluloid invented by George Eastman. The materials used during the construction of the camera were: wood (the structure of the box), glass (the lens), leather (the cover or covering of the wood) and metal (for the buttons and internal mechanisms).