Shallow depth of field makes the object of interest “pop” by
bringing the foreground into focus and de-emphasizing the
background. Achieving this optical effect has traditionally
required a big lens and aperture, and therefore hasn’t been
possible using the camera on your mobile phone or tablet.
That all changes with Lens Blur, a new mode in the Google Camera
app. It lets you take a photo with a shallow depth of field using
just your Android phone or tablet. Unlike a regular photo, Lens
Blur lets you change the point or level of focus after the photo
is taken. You can choose to make any object come into focus simply
by tapping on it in the image.
Interesting idea. Like filters, it’s another way to use software cleverness to work around the physical limitations of the small cameras in mobile devices.