The Swift Optical MA503 Eyepiece Pointer to add more usability to an eyepiece on an M15, M10, or M10D series microscope. The pointer installs in the eyepiece and is clearly visible in the field of view for demonstration or teaching purposes. Since the pointer is always in focus regardless of the magnification or plane of focus, it is an ideal accessory for users like gemologists to point out specific features on specimens like a gem, stone, or crystal to a colleague, customer, or student. Proper installation of the pointer requires the optional MA19896 retaining ring that holds it securely in place.