A high altitude photographic reconnaissance version with the pressurized cabin, retracting tail-wheel and pointed tail of the MKVII, a Merlin 64 or 71 engine, but with a normal span wing fitted with leading edge tanks and a larger oil tank in a less pointed nose gave the MK X Spitfire extra range. No armament fitted. Various camera installations installed. 16 Mark X Spitfires were produced. One was fitted with extended wing-tips.