Click on the image to open it at a larger size in another window.
This shot is a single frame that was first edited in NIK HDR Efex Pro 2 to adjust the tone map and tonality. I also added the vignette while in there. I then took the image back to Aperture 3 to sharpen it. I thought the preset added too much noise so I applied the Aperture 3 denoise adjustment and softened it slightly. I also boosted the vibrancy and detail a small amount to make the sky pop.