This Reverse Adapter Ring is made of premium grade alloy. The lens can be solidly mounted on the lens in reverse for incredible macro photography. By mounting the lens backward on a camera body， you can create amazing macro images. It is extremely fun to turn you lens into a macro lens. For Canon cameras make sure to set the camera to manual shooting mode with manual focusing to work properly. It dramatically expended your choice in selecting proper lenses for this adapter.                                    Features            <br> Precise thread and camera mount<br> Extreme macro photography<br> Anodized black finishing<br> Top-grade material， durable to use<br> Good after-sale service<br>                                                            Specifications             Dimensions     (2.56 x 0.67)" / (6.5 x 1.7)cm (Dia x H)    <br> Weight     1.2 oz /34 g    <br> Material     Alloy    <br> Color     Black     <br>                                                             Package Includes            1 x ReverseAdapter Ring for Canon<br>