On the walls

I took this photo in February 2012 in Sintra, Portugal and it shows ruins of the Moorish Castle. I regret taking only 3 exposures but unfortunately there was no way of taking more. I needed to shoot hand-held because there was no place on the walls of this enormous castle to set up tripod.

EXIF data:
Camera: Canon 5D MK II
Lens: Canon 24-105 f/4 L IS USM
Focal length: 24 mm
Aperture: f/9.0
Exposure time: 1/320 s ("middle" exposure)
ISO: 640
Number of exposures: 3
E.V. Step: 2 E.V.
Flash used: no
Tripod used: no
Filters used: no
Software: Photomatix Pro 4.2.5, Magic Lantern, Lightroom 4.2, Photoshop CS5