If you are trying to use a Leica M-mount lens on a Micro Four Thirds body or the Panasonic AG-AF100 camera, then this adapter will do the trick. The adapter is set up to take as much as possible from the "sweet spot" of whatever lens you use. This means minimal chromatic aberration and softness. You can still focus at infinity but you may lose some close-up capability with this adapter. You can use your Leica lens in either manual setting or aperture priority setting.