Mitutoyo M Plan Apo 100x/0.55 Super Long Working Distance Objective - New / Open Box

The Mitutoyo M Plan Apo 100×/0.55 SLWD is an extraordinary objective that solves one of the most challenging problems in high-magnification microscopy: how to achieve 100× magnification when the specimen cannot be brought within 0.2mm of the objective front element. With a 13mm working distance — compared to 0.1–0.2mm for standard 100× objectives — this objective provides clearance for specimens in environmental chambers, cryostats, vacuum chambers, laser processing systems, and industrial fixtures where standard objectives are physically incompatible. The plan apochromat correction ensures flat-field imaging with accurate chromatic registration across the full visible spectrum, essential for accurate defect documentation and color-based analysis at 100×. The M Plan Apo series is specifically designed for semiconductor IC defect evaluation and YAG laser repair applications, where the long working distance provides the clearance needed for laser delivery optics, beam steering components, and specimen fixtures to coexist with the imaging objective. The dry (air) design eliminates the need for immersion media, making it practical for use in industrial and semiconductor environments. Compatible with Mitutoyo FS series microscopes and other infinity-corrected systems with M26 thread nosepieces. Supplied new/open box, catalog number 378-813.