Made of quality metal material, it is sturdy and durable. Full manual operation, manual focus, It can focus to infinity. machining, ensures perfect fit for your cameras. To use, simply attach the to your lens and then the lens to the camera. When you have finished remove both together. Make it possible for Olympus OM mount lens become compatible for X-E1 X-E2 X-M1 X-A1 A2 x-RP1 mirrorless cameras. Saving you the expense of a costly and irreversible conversion.