The Zeiss Kodak Anastigmat lens on this Vest Pocket Kodak was an expensive optional upgrade. The name "Zeiss Kodak Anastigmat" indicates a Zeiss Tessar™ lens, manufactured by Zeiss for Kodak. Zeiss reserved the "Tessar" trademark solely for lenses sold under the Zeiss label. By 1912, when this camera was made, the Tessar design was ten years old. It was well on its way to becoming the most popular and widely used lens design of all time.