Complex sentence: Due to the limitations of the lens used and Ichiki's lack of formal training, it took many years for a quality photograph to be created, but on 17 September 1857, Ichiki created a portrait of Shimazu in formal attire.
Split into simpler sentences: Due to the limitations of the lens used and Ichiki's lack of formal training, it took many years for a quality photograph to be created. On 17 September 1857, Ichiki created a portrait of Shimazu in formal attire.