Photoshop CS6 Tutorial
How to Add an Iris Blur in Photoshop
Photoshop CS6 added three new blur options; Field Blur, Iris Blur and Tilt-Shift Blur. The three blur variations are meant to simulate a camera lens and can be accessed from a single Blur Tools panel. They can either be applied individually or a combination of the three.
Open an image in Photoshop (File > Open).
With the image layer selected in the Layers panel, choose Filter > Blur > Iris Blur.
In the Blur Tools panel, open the Iris Blur section and adjust the slider to increase the blur.
You may notice a small circle in the document. It is called a Pin. The Pin denotes the sharpest point in the image.
By clicking and dragging the handles and blur line, you can set the out point of focus region and the end point of the sharp zone.
To change the blur setting for a pin, click the pin and drag the circle around the pin. You can also select the pin and change the value in the Blur Tools panel.
To turn the Iris Blur effect on and off, click the checkbox. A quick way to delete all of the pins is to click the Remove All Pins icon
To add a Field Blur or Tilt-Shift Blur, click the triangle to next to the corresponding blur option. You can add multiple blurs to a single image.
Once you are satisfied, click OK and the blur is applied.
Deleting a Specific Pin
To remove a specific pin, click the pin and press the Delete key.
Temporarily Hiding Pins
To hide the pins so you can get a better view of your image, press Cmd/h (PC - Ctrl/h). Press Cmd/h (PC - Ctrl /h) a second time bo make the pins reappear. If you forget the keyboard shortcut, you can always choose View > Extras.