Jack Douglas said:Thanks guys.
Viggo, it was not liveview, not sure what you mean by using contrast focus.
Mikehit, I subscribe to your procedure and will have to bite the bullet and go through that process with a remote. At this point I've done so many variants that I must confess I'm getting a little tired of it, but you are right. On the other hand I have gone through iterations with 1/2000 shutter and still had issues.
I have of course observed visual shake with 800mm that suggests I may need a higher shutter speed in general. I thought IS and 1/2000 surely should be enough??
Still, in all this my focus was on getting AFMA right and I believe inconsistent AF did not allow me to pinpoint a reliable AFMA value - like how to explain an hour of testing suggesting +12 and another day extensive shooting is saying +1, oh well, such is life!
I figure I'd have to send both the lens and camera in although the lens seems fine with the 6D. I hate to part with it for a month.
Jack
In live View when you focus without flipping the mirror you bypass the whole AF sensor. That way you will completely take out every bit of phase detection AF, thus you'll focus perfectly and afma will not be a part of the equation.
The best way to see what's what when it comes to sharpness.
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