This is the perfect stereo microscope for machinists or hobbyists. The BAUSCH & LOMB StereoZoom 4 offers a magnification range from 0.7X to 30X, providing a clear and crisp view of your specimens in upright orientation. The microscope also features a binocular viewer for comfortable viewing and a sturdy construction with Bausch + Lomb's quality assurance. I am not an expert. Sold as-is not tested. Please ask your technical questions before bidding.