UFO Sighting in Annecy, Auvergne-Rhône-Alpes on 2020-05-31 17:17:00 – Took a picture and discover the object afterwards, while looking at the photo

I was taking the sun, in the afternoon, on the lake shore, as it can be noticed on the picture, i took a picture of the lake, and did not notice anyhing special. later i looked at the picture on my computer. sky was perfectly blue, no clouds, but there was a bizarre "cloud" at the upper right of the picture, so i magified it and saw a rounded object, reflecting the sun it does not seem to be any kind of drone, neither a baloon or plane, distance is hard to estimate, but i will say more than 200 meters , if not it would have be seen by most of the poeple ( the lake shore was crowded )