There\'s an older post on DPR that has some interesting info. looks like that default setting for the A7r is High. It also stsates that AF may take longer when on High:
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Sony Article ID: 44408 | Last Updated: 11/27/2013
The live view image is displayed with better resolution when Display Quality is set to High than when it is set to Standard.
NOTE:
Battery consumption is higher when Display Quality is set to High. The time required to auto focus may also be longer.
The default setting for Display Quality differs depending on the camera.
ILCE-7: Standard
ILCE-7R: High
------------------------------------------------------------------------------------------- http://www.dpreview.com/forums/thread/3586535
