I posted this on DPR, but I might as well post it here as well. A japanese review of the K-m did this technique for focus speed testing using a video camera:
- pick a bunch of points in your room at varying distances and number them
- go through the entire sequence of points and focus on each one (center focus point only), wait for the beep, then go to the next one
- at the end of the sequence, take a photo
- repeat for various levels of light
- repeat for SDM and screwdrive lenses
- obviously, video yourself doing the above
In that K-m review, it was *very* obvious the K-m didn't do the double focus check as much as the K20D w/ the same kit lens.
So if someone has two K20D (one w/ the latest firmware) and a video camera, we can get this answered once and for all. Post the video on youtube so we can view it side by side. Put time markers on the video.