|Nikon D800, 50mm f/1.4 D lens, f/11, 9 frame HDR, ISO 100, Nik HDR Efex Pro 2.|
Photoshop isn't the way to make the sun burst on the sun, nor is it a trick filter on the lens. It's simply done by using a small aperture (f/11, f/16, f/22). It's a cool feature of having blades inside the lens. The rays are accentuated by catching only the edge of the sun, obscuring most of the sun with an object like a tree limb, or the corner of a building. It should be pretty simple to do this even with your iPhone camera: looking at the screen (not the sun!) position the sun behind the edge of a building and snap away. I predict that you'll get pretty good rays.