B.I.G. Reverse Ring Camera with L-Mount to 67mm Filter Thread

Get closer to your subjects with this 67 mm Reverse Bayonet Adapter for Macro Lenses from B.I.G. for cameras with the L mount.

If you put the lens on your camera in reverse, it becomes a macro lens. Albeit in a function without autofocus and aperture control by the camera, but with unusual focus/blur effects. In some cases, this can lead to getting almost "right up close" to the subject with the lens, achieving extremely unusual perspectives.