Specification:Magnification: 2.5X, 5X, 10X, 20X, 50X, 100XNumberical Aperture(NA): 0.08, 0.12, 0.25, 0.4, 0.55, 0.8Working Distance(mm): 11.2, 23.6, 17.7, 10.4, 7, 3.2Focal Length(mm): 72, 36, 18, 9, 3.6, 1.8Resolution(um): 4.1, 2.8, 1.34, 0.8, 0.61, 0.41Focal Depth DF(um): 42.9, 42.9, 10.1, 3.5, 1.4, 0.6Object field of view(on object, mm): 9, 4.5, 2.2, 1.1, 0.45, 0.22Image square field of view(On image, mm):22.5, 22.5, 22.5, 22.5, 22.5, 22.5RMS (M20.2*0.706)Note:1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.