A few years ago, the concept was daring: capture an image and refocus it after you had pressed the shutter.
Lytro did it with an experimental sensor called a “Lightfield” array that captured every light point and allowed you to pick the field you were focusing on later on.
It was easier to interpret as a sensor that captured a chunk of time, because while a photograph was a slice of time in what you were seeing, Lytro’s technology was more like a big slice with more than the one depth point.
To make this work, Panasonic has taken advantage of the 4K engine inside these cameras, with the camera quickly grabbing a short 4K video for the shot, with a “depth from defocus” system being engaged inside the model to lock on all the focus points inside the scene.
Upon playback, Panasonic will let you choose which one you’d like to grab, with the focus point basically focused on inside the camera, and then exported to a 4K photo (8 megapixel image) in JPEG photo when it’s done.
Essentially, Panasonic is taking advantage of the clarity of a 4K video and its multiple focus points to make the concept work for it, which isn’t the same as what Lytro was using, but is definitely an interesting work around.
What you won’t get, however, is an interactive image, which is what Lytro was able to do. Rather, the images will either be exported from the camera in JPEG or stored in a small MP4 video, much like how the short videos worked on the Lumix G7 when pre-capturing images before you fired a shot.
“‘Post Focus’ is designed for macro shooting, food or portraiture where perfect focus is a must in achieving that great creative shot,” said Scott Hellish, Business Manager for the G Series at Panasonic.
“When the moment is fleeting, you can use this mode to capture your image, with flexibility in deciding on the absolutely ideal focus point after the event. You can take your shot and then review and select your preferred focus point so it is pin-sharp. ”
In Australia, the Lumix GX8, G7, and the FZ300 will get the feature in a firmware update coming November 26, while the GH4 is expected to grab the update early next year, but you can probably expect every other Panasonic 4K camera to get this upon release from hereon in, too.