This is an adapter for converting Minolta and Sony A-mount lenses to Sony E-mount. While the exact aperture value is unknown, you can determine it by using the lens's aperture value when it's fully open or fully closed. The aperture can be adjusted using the ring on the adapter. Focusing is manual. A-mount lenses are relatively inexpensive on auctions, so why not try playing around with lenses? I'm using a Cosina MC Macro 100mm F3.5 lens with the same adapter. Even with a junk lens where the lens's AF doesn't work, you should be able to take pictures as long as the lens isn't stuck. Includes shipping for 2200 yen. If you're interested in the same adapter combination as the lens mentioned above, I can list it. Please comment.