In using Focus Peaking since getting into the NEX-7, I started out with Red mid-strength based on somebody's recommendation and it worked fine for the first few months of learning the NEX-7 basics. Then after becoming familiar enough experimenting with the different colors & strengths I learned that switching those variables depending on different color & lighting conditions could be helpful...simplest example is trying to fine tune focus on a Red Northern Cardinal using the Red color is much harder than using White. And the more I used White the more I began to like it as my default choice instead of Red...and a lot of it has to do with what I call it's "shimmer". I don't mean the visible band of in-focus color that I can see sweeping back and forth across a scene as I'm focusing...I see that with all 3 colors. I mean that the White color peaking actually 'shimmers'...like a very high frequency blinking / pulsing / quaking sort of motion. It calls attention to even the tiniest spec of White and makes it easier (for me) to see. This happens on multiple NEX-7s and multiple lenses. So I'm curious whether or not any other NEX-7 users have experienced this? IE: Do all 3 colors do this for everybody else...or is it just the White...or is it just my particular eyesight / vision ?