LA-EA2 - TTL, 200g, Black
Attach α A-mount lenses to your E-mount camera body and enjoy continuous Phase Detection AF while capturing stills and video with world's first mount adaptor to be equipped with Translucent Mirror Technology™.
Allows α A-mount lenses to be used with E-mount camera bodies and supports full-time continuous Phase Detect AF. It's the world's first mount adaptor equipped with Translucent Mirror Technology that makes high speed, accurate AF possible when shooting both still images and action-packed video using a 15-point AF system and 3 cross sensors.
Translucent Mirror Technology built-in
The LA-EA2 is the first adapter in the world to include Sony's exclusive Translucent Mirror Technology and Phase Detect AF sensor.
AE support
An aperture drive mechanism enables AE with all A-mount lenses except teleconverters.
TL Phase Detection AF for video and stills
Allows your E-mount camera to enjoy high speed, accurate TTL phase detection auto focus for both still and video capture.
Sony LA-EA2, Black, 3.09 x 1.73 x 3.41" (78.5 x 44 x 86.5 mm), 1.73" (44 mm)
Sony LA-EA2. Product color: Black. Dimensions (WxDxH): 3.09 x 1.73 x 3.41" (78.5 x 44 x 86.5 mm), Length: 1.73" (44 mm)
Adapts A-mount SLR lenses to full-frame E-mount. Phase detect autofocus sensor. Screw-drive focus support. Tripod socket. 
Pricey compared to LA-EA3. A little bulky... 
The Sony LA-EA4 A-Mount to E-Mount FF Lens Adapter with TMT makes it possible to use Alpha SLR lenses on Sony mirrorless full-frame cameras with quick autofocus...