Param..a very fine shot indeed - this is a good example of where the loss of IQ at a smaller F-stop (F32) is pretty much meaningless. I've heard this issued raised before and though it is true IQ lessens beyond say F10 or so in some cases where shutter speed is shorter. With this one it is somewhat irrelevant as the longer exposure absorbs more definition. On a side note (not being contradictory but to end off the possibility of greater diffraction at such a small F stop) did you consider using an ND on this shot to use a wider F-stop vs. F32? Possibly dropping down the ISO to 50 to get additional slow down if using a wider Av. Again, just a thought.