That would be the Southern cross right at the top and the two 'pointers' a bit lower. Basically our version of the North starNo wonder I can't recognize those star patterns...Down Under. Perhaps that's Sagittarius ("upside down" as I am used to seeing it) near the bottom?
Went and looked it up. I suspected the two "pointers" were Alpha and Beta Centauri (the one time I was far enough south, I had seen them, they are VERY hard to miss). I had forgotten they served as pointers to Crux. It does look like one of the four stars in Crux might be off the top of the image, which made it even less likely I'd recognize it. (And I suspect some stretching up-and-down like with any very wide angle lens.) Crux itself "points" to the south celestial pole, of course, rather than being almost precisely on it like Polaris is.That would be the Southern cross right at the top and the two 'pointers' a bit lower. Basically our version of the North star
By coincidence, I also tried out the RF 800 + RF 1.4x at about the same time (next day), but on the R5. We had a very rare clear night and the moon was a strong orange colour. Similar settings to yours.