Eyepieces

Mitutoyo TM-Series eyepieces (10×, 15×, 20×) swap into Toolmaker’s Microscopes to set viewing comfort and image scale—total magnification = objective × eyepiece, while working distance is set by the objective. 10× gives the widest field and easiest alignment, 15× is the everyday balance of field and detail, and 20× adds extra image scale for tiny features at the cost of a smaller field and tighter eye relief. Choose the lowest power that still shows edges cleanly for general inspection, and step up to 15×/20× for fine radii, burr checks, thread/pitch reads, and other tight-tolerance work.