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Message: <blockquote data-quote="J-see" data-source="post: 390216" data-attributes="member: 31330">I didn't try to stack the shots, two different DOF with an identical focus point would overlap the other and defeat the purpose of focus stacking. I was only wondering what would happen when trying to blend two different aperture shots. My curiosity was more in regards to the tones. What I stumbled upon when using blend modes was accidental but I didn't understand what was happening and why it was happening.By now I have a much better idea what goes on and that it isn't as much the different apertures as the different "blurs" that trigger the effect. In a way it is a sharpening technique. A similar effect happens when using the same image twice. Put Gaussian blur on a copy and then blend it with the other. I've been experimenting until I got sidetracked by some computer issues. The Gaussian blur blend works well but only to a degree. The aperture stacking does better in regards to sharpening. I assume it has to do with the difference between the one blur being equally distributed while the other is directional.I've been trying the PS lens blur because it also allows me directional blur but it's a rather clumsy filter in my version. I'll have to test it more.I've been using the highpass to sharpen in PS but Gaussian/Difference seems to work as well. It's possible both are based upon the same principle.Thanks for the information.</blockquote>