The FB204E and FB205E stage focusing mounts are compatible with Prior's motorized stages for upright reflected microscopy. They are suitable for breadboard-mounted optical systems and customized microscopes. 

They incorporate the high-performance FB203E encoded linear actuator for 38 mm Z-axis travel with exceptional long-range repeatability. They have a high load capacity of 14 kg for use with heavy samples or large stages. 

FB204 is mounted in line with the axis of travel to provide a stable platform and maximize the height of the system. 

The base of FB205 is offset from the linear axis for integration with space-constrained customized optical systems.

Either the FB204 or FB205, when combined with a Prior stage and controller, provide an extremely reliable XYZ platform for both academic and industrial research into applications such as materials chemistry or semiconductor development. Its simple but high performance design makes it easy to integrate with gantry based optics.