Product details:

Use SLR Lenses with Smartphone, Fits Canon EF Mount Lenses, For Use with Beastgrip Pro Lens Adapter, Replaceable Focusing Screen, Includes 10x Macro Lens, Step-Up Adapter. Use SLR lenses with your smartphone with the Beastgrip DOF Adapter. This adapter enables you to use Canon EF mount lenses with mechanical manual focus rings with the separately available Beastgrip Pro Smartphone Lens Adapter allowing you to capture a shallow depth of field. The internal focusing screen is positioned in a modular holder and can be replaced without special tools. A 52mm 10x macro lens and a 37-52mm step-up ring are included. Note: Images will appear upside-down. Recommended for use with fast f/0.95 to f/2.8 lenses.