SM-7B-FRL Professional Binocular Stereo Zoom Microscope, WH10x Eyepieces, 7X-45X Magnification, 0.7X-4.5X Zoom Objective, 8W Fluorescent Ring Light, Articulating-Arm Boom Stand, 110V-120V

No problem with the optics (note I do have many years inspection experience with higher-end 'scopes, these optics compare favorably). You will need to re-focus after using the zoom.A bit of vibration is transferred through the stand, but this is because it sits on my bench where I am working (jeweler). Also, I have the stand extended quite a bit. I will be getting a 0.5 Barlow lens to double the working distance, as I can't QUITE always get my hands/tools on my work surface with the current working distance.Overall completely satisfied. Frankly I felt it unlikely that I would be getting this level of quality at this price point.