In Photography ‘depth of field’ refers to the range between the nearest and most distant objects in a photo that are acceptably in focus. Often times it is desirable to have a narrow depth of field to add interest to your photo. The simple photo below is made more interesting by having a very narrow depth of field, which brings only the closest clothes hanger into focus.
Achieving a narrow depth of field typically requires a SLR camera. But with the method I’ve outlined below, you can simulate a narrow depth of field with your iPhone.
Download the Big Lens app from the Apple App Store. Here’s the icon for the app. When I picked it up it was ninety-nine cents.
Once the photo is loaded you can use your finger to paint the area that you’d like to keep in focus. Don’t worry too much about getting it perfect, the app has a handy tool to help you clean up what you’ve done. As you can see, my coloring skills aren’t very good and I’ve gone outside the lines.
Once you’ve colored in the area you want to keep in focus, click on the Auto icon at the bottom of the screen. This will clean up your coloring job by trying to find the edge of the item you’ve colored.
Now it is time to start adding the blur effects that will simulate the depth of field. I’ve clicked on Next to get to this screen and then clicked on the Aperture icon in the lower left. This gives you some control over how much to blur the background.