As i have a few R lens in great condition.... i was thinking of how well they would work on a A7 using the focus aid .I normally need reading glasses etc and find range finders "slow" . having seen the videos of the A7 using this "red" focus assist system, it could be my dream come true ? ! "if its red where i want it.." shoot . Anyone else using R lens on a A7?? and what is the best adaptor ?