Photoshop CS6 is going to be loaded with features. One of the newest ones to be announced is the Blur Tool which lets you create a depth of field look. It looks very natural and is easy to use. Watch the video and see for yourself how easily you will be able to add depth of field to your photos.
Click the photo to watch the video.
There are other softwares that gives you depth of field but fast lens is not all about depth of field. You need one for low light situations so you dont get blurry images