I am joining late here but spent $80 (with coupon) to buy FoCal Pro. I tested several lenses on one of D800E this afternoon and amazingly, AF values are right on (or so close) to my visual results, which I spent days. This gave me confidence and reliability of the software. Multi Point Focus Test is the same and the result does not indicate radical focus differences in 51 points, which again is the same conclusion to my hours of manual tests. This is an impressive software.