This is 3 exposure HDR (-2/0/+2) shot on my Nikon D5100 with a Tokina 12-24mm f/4 AT-X Pro DX-II (rented) and a 0.9 (3 stop) ND filter. The images were imported into Adobe Lightroom and then combined in Photomatix Pro usign an export preset. I applied the natural preset in Photomatix Pro then imported the resultant image back into Adobe Lightroom for further processing.
The 35mm lens equivalent is 18-36mm f/6. The image was shot at 12mm f/8 (18mm f/11), ISO 100.
The following Adobe Lightroom adjustments were made to the HDR image.
* Exposure set to +0.60 to brighten the image
* Contrast to +11 to pull out more of the cloud details
* Set hightlights to -100 to reduce blown out areas.
* Increase shadow to 75 and white clipping to 1
* Set black clipping to 54
* Set blue to 51
* Set clarity to 33
There were some cranes that could be seen near the tops of some of the buildings. I didn't like these, so I imported a copy of the image (with Lightroom adjustments) into Adobe Photoshop and used content aware fill and clone stamping tools to remove them. The resultant image was imported back into Adobe Lightroom.
I then imported a copy of the image (with Lightroom adjustments) into Nik Color Efex Pro and applied the Reflector Efex preset with setting of Gold for the method with a light intensity of 33%.