This was one of my first chances to work with my new Canon 17mm tilt-shift lens. Normally, ultra-wide lenses provide deep depth of field, but in this
case, using a strong tilt (also traditionally called a swing when used sideways) on
the 17mm lens allowed me to have both the wide perspective and shallow
depth of field.
The above image is particularly effective due to being made with an infrared converted camera; in colour, the foliage and sky colour would have competed with the gun emplacement for attention, but in infrared, the foliage is bright an luminous, and the sky a pale white - leaving the gun the only dark element in the image, and the centre of attention!