[vimeo]http://www.vimeo.com/28596419[/vimeo] Occasionally you stumble on something completely unexpected. It’s great when this happens. The 5Ds and 7Ds, workhorses of the DSLR world, have nothing more to give; the lure and mystique of those early days in 2009 have all but vanished. The Sony NEX 5N however is different. A tempting new mistress who has yet to remove her makeup and demand you clean crusty left-over fries from the oven. I’ve only…