A bellows head requiring a basic extension of 67 mm for infinity focusing. With such an extension, it allows focusing from infinity to a reproduction

A bellows head requiring a basic extension of 67 mm for infinity focusing. With such an extension, it allows focusing from infinity to a reproduction ratio of 1:1.1. Use of only the central portion of its image circle further enhances its outstanding resolution due to apochromatic correction. These features plus almost complete freedom from distortion make the Apo-Symmar the ideal lens for product photography and copy work. With larger extensions, the lens may also be used beyond 1:1.