Like the digital SLR "PENTAX K-01" camera, this super thin single focal point lens was designed by the world-renowned industrial designer Marc Newson. Based on the optical design of the "DA 40mm F2.8 Limited" with its proven track record, this lens is the world's thinnest* with a total length of only 9.2mm, and it is also called a "biscuit lens". This size enables high mobility when storing or carrying around. *As of April 1, 2012. Compared to other lens replaceable SLR cameras.