OK Great discussion, This is why I keep coming back to TDP.

First Neuroanatomist:
So it looks like a 30 sec exposure was adequate for that shot to remove the objects moving though the scene.
Good info, and you used a 10 step filter.
I assume you checked your exposure, set your focus, then added the filter, then made a 10 stop adjustment to your speed.
I assume you can not focus through a 10stop filter.
Am I close on the technique?

Do you have any comment on a Singh-Ray variable ND (2-8) filter ($340) or the less expensive Genus brand (I believe they have a 1-4 stop and a 2-8 stop)?
Would the variable allow focus through a smaller ND then rotated up and avoid screwing on the ND filter and chance moving the focus ring?



Second Kayaker72:
Can you comment on your technique? Is it similar to how I described above?
What were your settings for each of your shots?
Why do you think you got no motion blurr on the people in the second shot, I assume they moved during the exposure.


Dr Crouble.

I really like your shot? I think it came out fantastic. Is this a panorama or a crop?
Why did you choose f5.6 for such a deep scene?


Thanks for the discussion

FYI
Nice discussion on strobist on this topic

http://strobist.blogspot.com/2010/06...-of-field.html