Short answers, pulled from the story.
The photograph Raising a Flag over the Reichstag was taken on the 2nd of May 1945 at about 3 am. This date marks the time when the Red Army had captured the building and the flag was raised during the staged reconstruction.
The photograph Raising a Flag over the Reichstag was taken by the photojournalist Yevgeny Khaldei. He used a Leica III rangefinder camera with a 35mm f3.5 lens to capture the image.
The photograph Raising a Flag over the Reichstag was taken with a Leica III rangefinder camera equipped with a 35mm f3.5 lens. This specific equipment was used by Yevgeny Khaldei to document the event.
The photograph Raising a Flag over the Reichstag was published on the 13th of May 1945 in the Ogonyok magazine. This publication date followed the editing process where Khaldei removed a watch from one of the soldiers.
The official story states that Meliton Kantaria and Mikhail Yegorov raised the flag, but the actual man attaching the flag was 18-year-old Private Aleksei Kovalev. Other soldiers present included Abdulkhakim Ismailov and Leonid Gorychev.
The copyright of the photograph Raising a Flag over the Reichstag belongs to TASS because Khaldei took the photo as part of his work for the agency. The Russian copyright expired on the 1st of January 2016 since the image was published in 1945.