We've been shooting in both DV50 and 720PN, and recently had to shoot a scene in 30 fps to match a legacy project. When we did, we were surprised to notice that it appear you lose about a half stop when you go from 30 to 24, in DVCPro, DV50 or 720. Anyone know why?
Are you sure you're not just swapping into a different scene file or shutter setting? Of course there's a difference in how 30 fps will see a scene compared to how 24 fps will see it- they are vastly different taking formats.