I love some of the new features in my new Olympus OM-D E-M1. They just released a firmware update that includes a new feature called Focus Stacking. This lets you take multiple shots shifting the focus and compositing them to create a final image with a very deep depth of field (i.e. larger than f/22) all in camera.

In the following shot I focused on the Snapple bottle. Notice my wife is out of focus in the background.

Mike PB280024OLYMPUS DIGITAL CAMERA

In the next shot I focused on my wife and the Snapple bottle is out of focus.

Mike PB280022OLYMPUS DIGITAL CAMERA

In this last shot I used the new Focus Stacking feature. Notice my wife and the Snapple bottle are in focus.

Mike PB280023OLYMPUS DIGITAL CAMERA

All three images were shot at 1/30 sec at F2.8 15mm ISO400. 

In the past, the photographer had to make an artistic decision about what was in focus or not and how much bokeh. But sometimes the photographer wants everything to be in focus. The physics of aperture and depth of field prevented that. Photographers developed a painstaking process to take many photos at different focal lengths and compositing (e.g., stacking them) in software like Photoshop to get the desired depth of field. Using focus stacking, you can do this in camera now. This is great for landscape and macro photography.