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I should have included a bit of explanation and the corresponding images either side of focus with the new design. The last three images are my attempt at either side and in focus with the Hartmann mask. I was using the same step size based on the focuspal motor focus controller, repeating the routine with each mask. I found it a lot more difficult to pick the sweet spot with the Hartmann mask as on the live screen the images look very similar for a few steps around the point of best focus. It is easier to pick the difference from these images when you see them side by side.
Peter
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