The product is suitable for: Canon Macro Reverse Ring EOS-58MMNote: Please close the body and remove the adapter ringUsing this reverse adapter ring, you can change the medium focal lens into a micro lens. The lens can be connected to the body upside down to achieve the purpose of macro photography with a normal lens. It is generally used for SLR digital cameras to reverse the lens for macro shooting.A reverse lens is to install the front end of the lens (with the filter end) on the camera body through the bayonet-screw reverse ring for macro photography. The principle is: Generally, the back focal length of the lens below 85mm is shorter than the front focal length, and the effective focal length becomes shorter after the reverse connection, so as to achieve the effect of close-up. For example, the reverse connection of a 50mm standard lens can achieve a 1:1 image-to-object ratio.material: metalColor: blackFunction: full manual focus, full manual apertureConversion caliber: bayonet on one side and 58mm screw on the otherCanon EOS mount reverse connection 58mm lens reverse connection ring, used for reverse connection of 58mm lens, super macro effect, can connect the lens upside down to the body, so as to achieve the purpose of macro photography with ordinary lens.The advantage is:1. Further increase the distance between the lens and the focal plane;2. It can achieve good results when shooting three-dimensional scenery;3. Simple and cheap.Note: In addition to this caliber, you can also use the adapter ring to convert to other calibers you need.In addition, any mount of this caliber lens can be connected and used.weakness is:1. After reverse connection, the function of the lens focusing ring is very small, focusing mainly by moving the distance between the camera and the subject;2. The camera's aperture linkage system no longer works;3. Short depth of field makes focusing difficult;4. Only lenses with a focal length between 20mm and 85mm can be used;5. The lens of the original lens bayonet part is completely exposed, and backlit shooting will cause glare.Note: 1. After connecting, the lens cannot be AF, and the aperture is fully manual (before purchasing, please make sure that your lens has manual aperture control)3. Since the magnification is very large after inversion, the focus range is very short, and the camera needs to be moved back and forth to find the focus, so this adapter is suitable for more patient players to use, and it is best to use it with a macro stand, which will be convenient Focus.