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The Diesel-type three-hole Spray B (injector 211201) of the Engine Combustion Network (ECN) was used in a single-cylinder light-duty optically-accessible Diesel engine. A simple optical method was developed to quasi-simultaneously image both liquid and gas phase of the fuel spray as well as combustion at kHz rates by retro-reflection of pulsed LED light from the fire deck. From the images, liquid penetration length, fuel vapor penetration, spray dispersion angle, ignition delay, flame luminosity, and ignition location were determined. Wide-field imaging allowed for studying the nozzle hole-to-hole variation. In addition to a variation of ambient temperature and density to achieve the standard ECN condition, a variation of fuel rail pressure and swirl ratio was also investigated, under both non-reacting and reacting conditions. The results show physically reasonable variations with different operating conditions.