The SF-323 Wide Angle Bellows - 6x9cm from Cambo is the wide angle lens bellows for the Ultima 23 and 23SF cameras.  The Ultima 23 was the first view camera designed for digital imaging. Compatible with nearly every medium format digital back, the Ultima 23 is a sensitive, dependable and well-crafted camera system. The SF-323 Wide Angle Bellows is an optional accessory to the Ultima 23 and is used for wide angle focal length shooting. It is a non-pleated bellows with a maximum extension of 12cm (4.7").