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Hi Thierry,
The rocks at the racetrack remain a mystery as to exactly how, why or when they move, there is no rhyme or reason. There are four credible theories, but the most agreed to seems to be extremely high winds -- though they do not know what the lubricant is. They have satellite imaged and geo-tagged some of the rocks and discovered some rocks move when the playa is wet while others move when it is frozen, while others don't move at all, but then some move when it is dry; some move a lot at one time where others do not move at all and then those do move when the first batch doesn't; big or small, some seemingly never move then all of a sudden make a large movement of several feet, others move minimally over regular intervals; some move in straight lines, others curve and still others make abrupt, angular turns; and the most confusing to the wind theory is some move in opposite directions at the same times.
Here's one from a cataloging project. AS Monolith, Rodenstock 135, IQ 180, f11, stacked. Yes, one of those subjects that only a collector could love, but technically interesting. Movements are doing what they should but note the distortion. How would one correct that? No profile for this lens in Alpa LC. Time to start shooting square grids and rolling my own or is there an easier way?
Thanks, Thierry, Sashin and Wentbackward. The camera was set up with the standards vertical and front dropped in best tabletop fashion. However, I found I could avoid convergeance in the center or at the sides, not both. I am really fond of the Rodie 135, but this is clearly not its thing.Yes, the only solution is to take a longer FL, actually as long as possible when such round or spherical objects are to be reproduced without distorsion.
Thierry