Caleb, Photoshop TutorialHow to blur backgrounds This is a tutorial on how to blur out a background. I think it makes portraits look a little better, but it can also help for any other photo in which you want to blur a certain section of it. You use the select and mask tool to select everything you want to stay in focus. Using a copy of the background you then use the lens blur and adjust accordingly.Unknown. “How to Blur Photo Background in Photoshop Like Very Expensive Lens Photography.” Youtube, uploaded by PSDESIRE, 10 Oct. 2017, https://www.youtube.com/watch?v=azsfUXCxtO8.