Day 34, Learning 34: High Pass Filter Sharpen

This is an alternate sharpening method in Photoshop.  It's pretty simple, and quite effective. 
1.  Duplicate your image (as a safety precaution).

2.  Select Filter - Other - High Pass.

 

3.  Set your Radius between 2 and 4 pixels.

4.  Now your image will be grey with the faintest outlines.

5.  Set your Blend Mode to Overlay and the gray layer becomes your sharpened layer.

You can toggle the layer on and off to see the effect.