I recently picked up a used full frame Canon EOS 5D body to augment my crop frame bodies. Below is a HDR image of Cohoes Falls I made yesterday morning.
The HDR was created from three images bracketing +/- 2 stops using HDR Darkroom software which I downloaded from the Mac App Store. I then cleaned up the resulting JPG in Canon's Digital Photo Pro, increasing contrast, sharpness and saturation to create the image seen below.
The base images were taken with my 70-200 zoom with polarizer at 70mm at f/20. The shutter speeds ranged from 1/25 to .4 seconds.
I did notice, however, that the 5D has some sensor dust which I hope I can remove with a blower.