What makes a perfect sunball? Rendering it the way I saw it.
Mostly it does not happen, occasionally it does. As Darren said - older cameras could not do it most of the time, and probably the main reason I needed to upgrade.
Newer cameras are certainly getting better, and I suspect if anyone ever gets to do a side by side test, the D3x will be the best yet.
The D700 is certainly a step up for me, but even with this camera I have trouble in certain conditions.
I think water conditions are as important as anything else. Less than ideal viz conditions, with the sunlight somewhat diffused, still creates Cyan fringing issues as we saw with James's shot, so I think it's as much a color (possibly gamut) limitation isssue as an exposure issue. I think Jeremy's shot show's that any camera can render a nice sunball, but I think conditions are key. I suspect if you changed the clarity and difffusion of the water in that pic, cyan fringing would raise it's ugly head, same depth, same exposure.
