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This was a three frame bracket set -2, 0, +2 EV merged and tone mapped in NIK HDR Efex Pro 2 starting with the Deep 1 Preset. I made some minor changes to the amount and method strength. I also dropped a control point on the sky in the background where I adjusted the exposure and contrast. I then returned the image to Aperture 3 and adjusted the overall exposure, cleaned up some dust spots, and enhanced the vibrance slightly.