No matter how well planned your shoot, no matter how well organized your equipment, the moment comes when the unexpected presents itself. It may come in the form of unexpected weather, conditions far hotter or cooler then anticipated, or photo subjects that were not planned. In landscape photography a large number of the better photos are serendipitous, with cloud patterns or lighting that could not possibly be anticipated, but can be captured if the timing and equipment is right. In the photo below, serendipity occurred in the form of wine barrels that had been moved outside from the cantina on their way to recycling, but which, while they were there, provided a wonderful photo op.
C. David Tobie