This is a laser lens holder for your iPhone that allows you to use your phone as a microscope. You will need to acquire a lens for this holder. I used a 4.2mm lens from a laser pointer, see link below. This lens holder will accommodate any 4.2 mm lens. But your magnification will vary based on your lens.

The laser lens should press fit into the holder, if the holder is too small you may need to drill it out. You can drill to 5-6mm if need be. Or if your lens is too small, you may need a small spot of glue to keep the lens in place.

The iphone 5/5s/SE holder is made for a phone without a camera bump and may work on other phones. If you would like me to adapt this holder to other phones, lenses and cases feel free to give me exact specs of related parts in the comments and I will try to make it for you.

Usage: On some phones you may need to hold your finger on the screen until you get AE/AF lock. This will help when auto-focus makes getting a good picture difficult.

https://www.amazon.com/Laser-Pointer-Catch-Interactive-Exercise/dp/B0779639SH/ref=sr_1_38?ie=UTF8&qid=1517330946&sr=8-38&keywords=cat+laser