... the two center of the circle distance of two parallel lines, point to the straight line distance, vertical length, etc.), rapid measurement of ... : 15 inch colorZoom lens magnification: 0.7 ~ 4.5X Working distance 108mmVideo Total magnification: 40 ~ 255X field of view objects: 7 ... ), 50HZ, 30W ObjectiveVideo magnificationField of view in object (mm)Working Distance (mm) 0.5×20×~128×14~2.21892×80×~510 ...