This is a general-purpose zoom macro lens. It allows for shooting with a shallow depth of field. It's a 37mm mount and can be used with various smartphones with a single touch. The holder also has 17mm threads, so other general-purpose zoom lenses can also be used. A 2.6x zoom teleconverter that can be used with this is also available. If you are considering purchasing both, we will offer a set discount, so please let us know in the comments.