Christopher Williams' 2013 Photographic Work Documents Zeiss Lens Specifications

A pigmented inkjet print by Christopher Williams, measuring 16 × 20 inches, was created on January 18, 2013. The artwork meticulously documents technical specifications of a Carl Zeiss AG camera lens manufactured in Oberkochen, Germany. This lens, identified as a Zeiss Distagon T* 2.8/15 ZM with serial number 15555891, features a focal length of 15mm and an aperture range from 2.8 to 22. Its construction includes 11 elements in 9 groups, with a focusing range extending from 0.3 meters to infinity. At close range, the image ratio is 1:18, covering an area of 43 cm × 65 cm. The angular field measures 110 degrees diagonally, 100 degrees horizontally, and 77 degrees vertically. Weighing 500 grams and measuring 86 mm in length, the lens uses an M 72 × 0.75 filter. The print was produced at Studio Rhein Verlag in Düsseldorf and belongs to a private collection. The work was posted on artcritical.com on November 5, 2014.