The Hasselblad Bellows Extension is made for close up photography,it extends from 2.5-8" and has markings for the 80mm,100mm,120mm,135mm and 150mm lenses with reproduction scales.The double cable release (not included) permit simultaneous operation of the cameras and lenses mounted on the bellows.
Using this bellows with a Hasselblad 135mm f/5.6 S-Planar lens with allows a 1:1 reproduction.