Focus Stacking for Extended Depth of Field in Photoshop

Take a series of images focusing on each from the front to the back. The more inages, the better.

Select File->Scripts->Load Files into Stack

Select the files. Click OK.

When this dialogue comes up, be sure to check the Attempt to Align box. Click OK.

Photoshop will load the stack as layers and align the images. When done, select all layers.

Select Edit->Auto-Blend Layers

Select Stack Images and click OK.

Photoshop will select the sharpest part of each image and create layer masks to blend them all together.