TechartPro published additional information on their new Leica M to Sony E AF lens adapter (the full press release can be found here):
Features:
Technical specs:
| Objective lens mount | Leica M mount |
| Camera mount | Sony E |
| Compatible cameras | Sony A7 (II) , Sony A7R (II) |
| Maximum bayonet extension | 4.5mm |
| Supported Focusing Mode | AF-S / AF-C |
| Aperture Control | Manual |
| Maximum weight supported | 700g(* Handheld support recommended for heavy lens) |
| Lens data record in EXIF | 10 sets |
| After-shoot Parking | 2.5mm / 4.5mm |
| Wireless control | Bluetooth via Android/iPhone app |
| Weight | 133g |
| Dimensions | 80 * 20 mm |
“Techart PRO adapter is basically a lens adapter with a motor and a printed circuit board, allowing the camera to measure the focus and communicate with the motor. And the motor will move the lens closer or further away from the camera sensor to reach the focal point. The principle is similar to the Contax AX camera that the flange distance is adjusted to reach the focus. The maximum z-shift is 4.5mm which is sufficient to cover the focusing distance for most of the lenses. And the optical performance will NOT be affected for unit focusing lenses.”