Dino-lite am4115tf edge far working distance handheld digital microscope, 1.3 mp, 10x – 70x the dino-lite am4115tf edge series “far” working distance model is designed to provide extra-long working distance with a magnification range of 10x-70x. At 10x with 19″ working distance and 70″ at 4.25″. The 1.3mp am4115tf impressively offers minimum 115mm viewing distance with maximum 70x magnification. In comparison to the edge series long working distance models, the am4115tf extends 80mm working distance at 70x magnification, making it an ideal option for fabrication or observation requiring long distance.