Here is a photo taken by my grandfather in 1914 or thereabouts. Taken in France as part of the French American Ambulance Corps. B & W original:
Minimal retouching/enhancing in Photoshop. Original is small - maybe 2.5" x 4".
Scanner is very old, but good - Agfa if I recall. Software is VueScan set to 600 dpi or so.