A cannon stands guard outside Ludlow Castle, Shropshire, England. The cannon was captured from the Russians in Sevastopol in the Crimean War, 1855.
Process NEFs to 16 bit TIFFs in Capture NX + process EV-1 image with EV-1 exposure compensation (so EV-2 equiv.)
Combine images in Photoshop CS4
Purple Fringing removal, Straighten, Smudge cloned out, Dodge/Burn, B&W conversion in Photoshop CS4