Available for modular tool microscope system, AME-5M Goniometer Eyepiece measures over 360° to accuracy of 5' (minutes) by use of rotary Vernier and crosshair eyepiece. Unit features white scale on black background and can be enlarged by 10X magnifier. Modular design enables user to attain magnifications from 3X–800X using choice of 3 microscope body styles, 3 rack-and-pinion mounting brackets, 2 illuminators, and 2 video adapters. System can handle workpieces up to 7 in. in length.