Microscope Lens Adapter Microscope Smartphone Camera Adaptor - for Microscope Eyepiece Tube 23.2mm, Built-in WF 16mm Eyepiece 1. Universal —It is compatible with a variety of phones whose's width range from 2.2" to 3.9" such as iphone 4, 4s, 5, 5s, 6, 6s, 6plus, 7,7plus, Samsung Galaxy S5, S4, S3, S2, Moto Etc. 2. Easy to use 3. Phone is well protected by High density EVA pads and nothing contacts your phone's screen. 4. 23.2mm eyepiece barrel. Works on microscopes with 23.2mm optical tube.. 45 degree view angle 5. Durable Material: The body is made of high strength Plastic. 6. Compact and light weight. Super easy to use 1. Set the phone in the clamp. 2. Open the camera. Look at the screen and adjust the position of the phone. There will be a bright circle when the phone and eyepiece is aligned. 3. Insert the adapter and phone into the microscope tube. 4. Adjust the focuser to get a clear image. 5. Zoom the phone to full screen.