I downloaded Zerene stacker the trial version. It said use small images in the trial version, And I used small on my Canon 450d. I tried a sample of Alabaster since it has lots of depth being a rock or mineral. I took 8 images trying to focus from top to bottom. Then loaded into Zerene. Amazing what it can do. The trial version has not many options to use but it seem to do a great job, Way better than my single shots. What more control do you get when buying Zerene Stacker. Thanks and here is a pic . this was at 15x