DSLR Camera : Photo Editor with image blur tool allows you to blur the background of your photo very fast to create amazing photos with blurred background.
If you want to focus in your photo at particular area you can easy download this DSLR camera - Blur Background app. Blur image lets you selectively blur or un-blur the parts of your pictures so that you can manually focus on the subject properly.
You can easily undo, redo the wrong actions in this app. DSLR camera costs very much but this Blur Application is Free.