deke.com posts about focus

Deke's Techniques 100: Creating an Dual-Focus Hybrid Image

Learn how to create a specific and famous flavor of optical illusion. When viewed from far away, the image appears as one thing; when viewed close up, it appears as another.

Photoshop Top 40, Feature #14: Gaussian Blur

Gaussian Blur is a filter that blurs an image. But it's also the math behind the Feather command, drop shadows, and everything that is soft in Photoshop. Watch this video and learn why GB is so important.