iDu Optics LabCam Microscope Adapter for iPhone 6/6S Fit most Nikon, Olympus, Zeiss and Leica stereomicroscope. Except surgical microscopes, please check with us first. Full refund if not fit, or any reason if you are not fully satisfied. It comes with its own lens to be inserted into the eyepiece slot, thus no adjustment need to take a perfect image. Professional adapter for research, medical, and educational use. High image quality guaranteed in any condition. If you are not satisfied you can return it and get a full refund in 30 days. Most microscope have 23mm or 30mm eyepiece slot. We provide adapter directly insert into 23mm or 30mm eye piece slot, no adjustment needed. Capture publication quality image/video with iPhone (see sample images). For P.O. orders please email us at adapter@iduoptics.com