In practice, it can be dicult to insert a reference beam (or even a holographic plate) on to the microscope stage, but the hologram can in fact be recorded anywhere between the stage and the eye, with identical results. One method of reconstruction is to generate a real image at unit magnication by placing two objectives back to back, as suggested by Heiger et al. [7]. ese systems are shown schematically in Figure 26.3. In Position A the hologram is being made directly, and the microscope itself is redundant, except for the convenience of the optical condenser and the stage. Position B is at or near the prime focus of the objective, and in playback the hologram can be moved in and out relative to the eyepiece. Position C catches a real image and forms a focused-image hologram. is cannot be viewed directly as the axial magnication, being the square of lateral magnication, is too great.