Just re-reading my translation of the IF items found in Ekaterinburg after the murders. Three reels of Kodak film were found burned in the stove of Popov house. So even partially burnt, any images would have been impossible to retrieve using the technology of the day.
At the house of the guard Letemine was found a wide-view camera and 33 glass negative plates. Their whereabouts lost after cataloguing by Sokolov.
It seems highly unlikely that any pictures taken had survived. The paper prints, if any surely did not survive burning.