Hi Kiwi I did the test (not set up quite with a beer can). I did not have exactly 20 feet but was about 15 feet away from the red flower vase (which was my point of focus for all 3 shots). The first was taken with AF (changed the settings in the menu to set the AF-area mode to be Dynamic Area). The second was also taken with AF this time chaning the AF-Area to Single Point. the last one was taken with manual focus. All 3 was focused (middle focus point) at the middle of the red flower vase at F4 at 1/200 with external flash and tripod mounted.
I think all of them are soft focused (the first one being the worst with AF and Dynamic area).