The OT1 Objective Lens Turret consists of an aluminum housing with strategically placed steel inserts to ensure durability. The turret can hold up to four objective lenses in the RMS-threaded (0.800"-36) ports. Each port contains a detent mechanism to position the objective with ±2.5 μm of bi-directional repeatability. The turret has an SM1-threaded (1.035"-40) mounting interface, allowing the turret to be used with custom imaging systems constructed from our Lens Tube and Cage Systems.