ALPA introduced the original back adapters for Hasselblad V (type HA), Mamiya RB67 (type MA) and Horseman (type HO) in 1998. They are in production since then in slightly modified versions.
Introduced in 2004
ALPA introduced adjustable adapters for digital backs at Photokina 2004. Since then, ALPA adjustable adapters are shimable in a range of 1/100 mm to 3/10 mm. Each such adapter is provided with the respective shims.