Horsehead Before and After using "OZONE" plugin Horsehead

I ran across an article in the July/August PCPhoto magazine that referenced Ansel Adams zone processing for photography, and a company that had developed a zone processing plugin called OZONE for Photoshop that defines 11 distinct zones with the ability to individually control each one. I bought the plugin ($75.00) and tried it out on my Ha image of IC5070. My first try at this brought out things I missed using only levels and curves, so I am looking forward to getting better at using this new tool. Here is a comparison of my best effort using levels and curves, and then the "OZONE" processed image.

This image was processed using just levels and curves. This image was processed with the OZONE plugin from Digital File Tools for Photoshop.